Remove vbus component and related codecopilot/remove-vbus-code-implementation

Co-authored-by: BernardXiong <[email protected]>

17 files changed, 0 insertions, 1783 deletions

diff --git a/libcpu/arm/realview-a8-vmm/SConscript b/libcpu/arm/realview-a8-vmm/SConscript
deleted file mode 100644
index f582c789f8..0000000000
--- a/libcpu/arm/realview-a8-vmm/SConscript
+++ /dev/null
@@ -1,23 +0,0 @@
-# RT-Thread building script for component
-
-from building import *
-
-Import('rtconfig')
-
-cwd     = GetCurrentDir()
-src     = Glob('*.c') + Glob('*.cpp')
-CPPPATH = [cwd]
-
-if rtconfig.PLATFORM in ['armcc', 'armclang']:
-    src += Glob('*_rvds.S')
-
-if rtconfig.PLATFORM in ['gcc']:
-    src += Glob('*_init.S')
-    src += Glob('*_gcc.S')
-
-if rtconfig.PLATFORM in ['iccarm']:
-    src += Glob('*_iar.S')
-
-group = DefineGroup('libcpu', src, depend = [''], CPPPATH = CPPPATH)
-
-Return('group')
diff --git a/libcpu/arm/realview-a8-vmm/armv7.h b/libcpu/arm/realview-a8-vmm/armv7.h
deleted file mode 100644
index f284bb5255..0000000000
--- a/libcpu/arm/realview-a8-vmm/armv7.h
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- */
-#ifndef __ARMV7_H__
-#define __ARMV7_H__
-
-/* the exception stack without VFP registers */
-struct rt_hw_exp_stack
-{
-    unsigned long r0;
-    unsigned long r1;
-    unsigned long r2;
-    unsigned long r3;
-    unsigned long r4;
-    unsigned long r5;
-    unsigned long r6;
-    unsigned long r7;
-    unsigned long r8;
-    unsigned long r9;
-    unsigned long r10;
-    unsigned long fp;
-    unsigned long ip;
-    unsigned long sp;
-    unsigned long lr;
-    unsigned long pc;
-    unsigned long cpsr;
-};
-
-struct rt_hw_stack
-{
-    unsigned long cpsr;
-    unsigned long r0;
-    unsigned long r1;
-    unsigned long r2;
-    unsigned long r3;
-    unsigned long r4;
-    unsigned long r5;
-    unsigned long r6;
-    unsigned long r7;
-    unsigned long r8;
-    unsigned long r9;
-    unsigned long r10;
-    unsigned long fp;
-    unsigned long ip;
-    unsigned long lr;
-    unsigned long pc;
-};
-
-#define USERMODE    0x10
-#define FIQMODE     0x11
-#define IRQMODE     0x12
-#define SVCMODE     0x13
-#define MONITORMODE 0x16
-#define ABORTMODE   0x17
-#define HYPMODE     0x1b
-#define UNDEFMODE   0x1b
-#define MODEMASK    0x1f
-#define NOINT       0xc0
-
-#define T_Bit       (1<<5)
-#define F_Bit       (1<<6)
-#define I_Bit       (1<<7)
-#define A_Bit       (1<<8)
-#define E_Bit       (1<<9)
-#define J_Bit       (1<<24)
-
-#endif
diff --git a/libcpu/arm/realview-a8-vmm/context_gcc.S b/libcpu/arm/realview-a8-vmm/context_gcc.S
deleted file mode 100644
index 56b65d9d52..0000000000
--- a/libcpu/arm/realview-a8-vmm/context_gcc.S
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (c) 2006-2018, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2013-07-05     Bernard      the first version
- */
-
-#include <rtconfig.h>
-
-.section .text, "ax"
-/*
- * rt_base_t rt_hw_interrupt_disable();
- */
-.globl rt_hw_interrupt_disable
-rt_hw_interrupt_disable:
-    mrs r0, cpsr
-    cpsid i
-    bx  lr
-
-/*
- * void rt_hw_interrupt_enable(rt_base_t level);
- */
-.globl rt_hw_interrupt_enable
-rt_hw_interrupt_enable:
-    msr cpsr, r0
-    bx  lr
-
-/*
- * void rt_hw_context_switch_to(rt_uint32 to);
- * r0 --> to
- */
-.globl rt_hw_context_switch_to
-rt_hw_context_switch_to:
-    ldr sp, [r0]            @ get new task stack pointer
-
-    ldmfd sp!, {r4}         @ pop new task spsr
-    msr spsr_cxsf, r4
-
-    ldmfd sp!, {r0-r12, lr, pc}^   @ pop new task r0-r12, lr & pc
-
-.section .bss.share.isr
-_guest_switch_lvl:
-    .word 0
-
-.globl vmm_virq_update
-
-.section .text.isr, "ax"
-/*
- * void rt_hw_context_switch(rt_uint32 from, rt_uint32 to);
- * r0 --> from
- * r1 --> to
- */
-.globl rt_hw_context_switch
-rt_hw_context_switch:
-    stmfd   sp!, {lr}       @ push pc (lr should be pushed in place of PC)
-    stmfd   sp!, {r0-r12, lr}   @ push lr & register file
-
-    mrs r4, cpsr
-    tst lr, #0x01
-    orrne r4, r4, #0x20     @ it's thumb code
-
-    stmfd sp!, {r4}         @ push cpsr
-
-    str sp, [r0]            @ store sp in preempted tasks TCB
-    ldr sp, [r1]            @ get new task stack pointer
-
-    ldmfd sp!, {r4}         @ pop new task cpsr to spsr
-    msr spsr_cxsf, r4
-    ldmfd sp!, {r0-r12, lr, pc}^  @ pop new task r0-r12, lr & pc, copy spsr to cpsr
-
-/*
- * void rt_hw_context_switch_interrupt(rt_uint32 from, rt_uint32 to);
- */
-.globl rt_thread_switch_interrupt_flag
-.globl rt_interrupt_from_thread
-.globl rt_interrupt_to_thread
-.globl rt_hw_context_switch_interrupt
-rt_hw_context_switch_interrupt:
-    ldr r2, =rt_thread_switch_interrupt_flag
-    ldr r3, [r2]
-    cmp r3, #1
-    beq _reswitch
-    ldr ip, =rt_interrupt_from_thread   @ set rt_interrupt_from_thread
-    mov r3, #1              @ set rt_thread_switch_interrupt_flag to 1
-    str r0, [ip]
-    str r3, [r2]
-_reswitch:
-    ldr r2, =rt_interrupt_to_thread     @ set rt_interrupt_to_thread
-    str r1, [r2]
-    bx  lr
diff --git a/libcpu/arm/realview-a8-vmm/cp15.h b/libcpu/arm/realview-a8-vmm/cp15.h
deleted file mode 100644
index b18331af92..0000000000
--- a/libcpu/arm/realview-a8-vmm/cp15.h
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- */
-#ifndef __CP15_H__
-#define __CP15_H__
-
-unsigned long rt_cpu_get_smp_id(void);
-
-void rt_cpu_mmu_disable(void);
-void rt_cpu_mmu_enable(void);
-void rt_cpu_tlb_set(volatile unsigned long*);
-
-void rt_cpu_vector_set_base(unsigned int addr);
-
-#endif
diff --git a/libcpu/arm/realview-a8-vmm/cp15_gcc.S b/libcpu/arm/realview-a8-vmm/cp15_gcc.S
deleted file mode 100644
index 0e3e60655c..0000000000
--- a/libcpu/arm/realview-a8-vmm/cp15_gcc.S
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * Copyright (c) 2006-2018, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2013-07-05     Bernard      the first version
- */
-
-.globl rt_cpu_get_smp_id
-rt_cpu_get_smp_id:
-    mrc     p15, #0, r0, c0, c0, #5
-    bx      lr
-
-.globl rt_cpu_vector_set_base
-rt_cpu_vector_set_base:
-    mcr     p15, #0, r0, c12, c0, #0
-    dsb
-    bx      lr
-
-.globl rt_hw_cpu_dcache_enable
-rt_hw_cpu_dcache_enable:
-    mrc     p15, #0, r0, c1, c0, #0
-    orr     r0,  r0, #0x00000004
-    mcr     p15, #0, r0, c1, c0, #0
-    bx      lr
-
-.globl rt_hw_cpu_icache_enable
-rt_hw_cpu_icache_enable:
-    mrc     p15, #0, r0, c1, c0, #0
-    orr     r0,  r0, #0x00001000
-    mcr     p15, #0, r0, c1, c0, #0
-    bx      lr
-
-_FLD_MAX_WAY:
-   .word  0x3ff
-_FLD_MAX_IDX:
-   .word  0x7ff
-
-.globl rt_cpu_dcache_clean_flush
-rt_cpu_dcache_clean_flush:
-    push    {r4-r11}
-    dmb
-    mrc     p15, #1, r0, c0, c0, #1  @ read clid register
-    ands    r3, r0, #0x7000000       @ get level of coherency
-    mov     r3, r3, lsr #23
-    beq     finished
-    mov     r10, #0
-loop1:
-    add     r2, r10, r10, lsr #1
-    mov     r1, r0, lsr r2
-    and     r1, r1, #7
-    cmp     r1, #2
-    blt     skip
-    mcr     p15, #2, r10, c0, c0, #0
-    isb
-    mrc     p15, #1, r1, c0, c0, #0
-    and     r2, r1, #7
-    add     r2, r2, #4
-    ldr     r4, _FLD_MAX_WAY
-    ands    r4, r4, r1, lsr #3
-    clz     r5, r4
-    ldr     r7, _FLD_MAX_IDX
-    ands    r7, r7, r1, lsr #13
-loop2:
-    mov     r9, r4
-loop3:
-    orr     r11, r10, r9, lsl r5
-    orr     r11, r11, r7, lsl r2
-    mcr     p15, #0, r11, c7, c14, #2
-    subs    r9, r9, #1
-    bge     loop3
-    subs    r7, r7, #1
-    bge     loop2
-skip:
-    add     r10, r10, #2
-    cmp     r3, r10
-    bgt     loop1
-
-finished:
-    dsb
-    isb
-    pop     {r4-r11}
-    bx      lr
-
-.globl rt_hw_cpu_dcache_disable
-rt_hw_cpu_dcache_disable:
-    push    {r4-r11, lr}
-    bl      rt_cpu_dcache_clean_flush
-    mrc     p15, #0, r0, c1, c0, #0
-    bic     r0,  r0, #0x00000004
-    mcr     p15, #0, r0, c1, c0, #0
-    pop     {r4-r11, lr}
-    bx      lr
-
-.globl rt_hw_cpu_icache_disable
-rt_hw_cpu_icache_disable:
-    mrc     p15, #0, r0, c1, c0, #0
-    bic     r0,  r0, #0x00001000
-    mcr     p15, #0, r0, c1, c0, #0
-    bx      lr
-
-.globl rt_cpu_mmu_disable
-rt_cpu_mmu_disable:
-    mcr     p15, #0, r0, c8, c7, #0    @ invalidate tlb
-    mrc     p15, #0, r0, c1, c0, #0
-    bic     r0, r0, #1
-    mcr     p15, #0, r0, c1, c0, #0    @ clear mmu bit
-    dsb
-    bx      lr
-
-.globl rt_cpu_mmu_enable
-rt_cpu_mmu_enable:
-    mrc     p15, #0, r0, c1, c0, #0
-    orr     r0, r0, #0x001
-    mcr     p15, #0, r0, c1, c0, #0    @ set mmu enable bit
-    dsb
-    bx      lr
-
-.globl rt_cpu_tlb_set
-rt_cpu_tlb_set:
-    mcr     p15, #0, r0, c2, c0, #0
-    dmb
-    bx      lr
diff --git a/libcpu/arm/realview-a8-vmm/cpu.c b/libcpu/arm/realview-a8-vmm/cpu.c
deleted file mode 100644
index 0eee5a70ee..0000000000
--- a/libcpu/arm/realview-a8-vmm/cpu.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2011-09-15     Bernard      first version
- */
-
-#include <rthw.h>
-#include <rtthread.h>
-#include <board.h>
-
-/**
- * @addtogroup AM33xx
- */
-/*@{*/
-
-/*@}*/
diff --git a/libcpu/arm/realview-a8-vmm/gic.c b/libcpu/arm/realview-a8-vmm/gic.c
deleted file mode 100644
index 4bc80dd5ef..0000000000
--- a/libcpu/arm/realview-a8-vmm/gic.c
+++ /dev/null
@@ -1,306 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2013-07-20     Bernard      first version
- * 2014-04-03     Grissiom     many enhancements
- */
-
-#include <rtthread.h>
-#include <board.h>
-
-#include "gic.h"
-#include "cp15.h"
-
-struct arm_gic
-{
-    rt_uint32_t offset;
-
-    rt_uint32_t dist_hw_base;
-    rt_uint32_t cpu_hw_base;
-};
-static struct arm_gic _gic_table[ARM_GIC_MAX_NR];
-
-#define GIC_CPU_CTRL(hw_base)               __REG32((hw_base) + 0x00)
-#define GIC_CPU_PRIMASK(hw_base)            __REG32((hw_base) + 0x04)
-#define GIC_CPU_BINPOINT(hw_base)           __REG32((hw_base) + 0x08)
-#define GIC_CPU_INTACK(hw_base)             __REG32((hw_base) + 0x0c)
-#define GIC_CPU_EOI(hw_base)                __REG32((hw_base) + 0x10)
-#define GIC_CPU_RUNNINGPRI(hw_base)         __REG32((hw_base) + 0x14)
-#define GIC_CPU_HIGHPRI(hw_base)            __REG32((hw_base) + 0x18)
-
-#define GIC_DIST_CTRL(hw_base)              __REG32((hw_base) + 0x000)
-#define GIC_DIST_TYPE(hw_base)              __REG32((hw_base) + 0x004)
-#define GIC_DIST_IGROUP(hw_base, n)         __REG32((hw_base) + 0x080 + ((n)/32) * 4)
-#define GIC_DIST_ENABLE_SET(hw_base, n)     __REG32((hw_base) + 0x100 + ((n)/32) * 4)
-#define GIC_DIST_ENABLE_CLEAR(hw_base, n)   __REG32((hw_base) + 0x180 + ((n)/32) * 4)
-#define GIC_DIST_PENDING_SET(hw_base, n)    __REG32((hw_base) + 0x200 + ((n)/32) * 4)
-#define GIC_DIST_PENDING_CLEAR(hw_base, n)  __REG32((hw_base) + 0x280 + ((n)/32) * 4)
-#define GIC_DIST_ACTIVE_SET(hw_base, n)     __REG32((hw_base) + 0x300 + ((n)/32) * 4)
-#define GIC_DIST_ACTIVE_CLEAR(hw_base, n)   __REG32((hw_base) + 0x380 + ((n)/32) * 4)
-#define GIC_DIST_PRI(hw_base, n)            __REG32((hw_base) + 0x400 +  ((n)/4) * 4)
-#define GIC_DIST_TARGET(hw_base, n)         __REG32((hw_base) + 0x800 +  ((n)/4) * 4)
-#define GIC_DIST_CONFIG(hw_base, n)         __REG32((hw_base) + 0xc00 + ((n)/16) * 4)
-#define GIC_DIST_SOFTINT(hw_base)           __REG32((hw_base) + 0xf00)
-#define GIC_DIST_CPENDSGI(hw_base, n)       __REG32((hw_base) + 0xf10 + ((n)/4) * 4)
-#define GIC_DIST_ICPIDR2(hw_base)           __REG32((hw_base) + 0xfe8)
-
-static unsigned int _gic_max_irq;
-
-int arm_gic_get_active_irq(rt_uint32_t index)
-{
-    int irq;
-
-    RT_ASSERT(index < ARM_GIC_MAX_NR);
-
-    irq = GIC_CPU_INTACK(_gic_table[index].cpu_hw_base);
-    irq += _gic_table[index].offset;
-    return irq;
-}
-
-void arm_gic_ack(rt_uint32_t index, int irq)
-{
-    rt_uint32_t mask = 1 << (irq % 32);
-
-    RT_ASSERT(index < ARM_GIC_MAX_NR);
-
-    irq = irq - _gic_table[index].offset;
-    RT_ASSERT(irq >= 0);
-
-    GIC_DIST_ENABLE_CLEAR(_gic_table[index].dist_hw_base, irq) = mask;
-    GIC_CPU_EOI(_gic_table[index].cpu_hw_base) = irq;
-    GIC_DIST_ENABLE_SET(_gic_table[index].dist_hw_base, irq) = mask;
-}
-
-void arm_gic_mask(rt_uint32_t index, int irq)
-{
-    rt_uint32_t mask = 1 << (irq % 32);
-
-    RT_ASSERT(index < ARM_GIC_MAX_NR);
-
-    irq = irq - _gic_table[index].offset;
-    RT_ASSERT(irq >= 0);
-
-    GIC_DIST_ENABLE_CLEAR(_gic_table[index].dist_hw_base, irq) = mask;
-}
-
-void arm_gic_clear_pending(rt_uint32_t index, int irq)
-{
-    rt_uint32_t mask = 1 << (irq % 32);
-
-    RT_ASSERT(index < ARM_GIC_MAX_NR);
-
-    irq = irq - _gic_table[index].offset;
-    RT_ASSERT(irq >= 0);
-
-    GIC_DIST_PENDING_CLEAR(_gic_table[index].dist_hw_base, irq) = mask;
-}
-
-void arm_gic_clear_active(rt_uint32_t index, int irq)
-{
-    rt_uint32_t mask = 1 << (irq % 32);
-
-    RT_ASSERT(index < ARM_GIC_MAX_NR);
-
-    irq = irq - _gic_table[index].offset;
-    RT_ASSERT(irq >= 0);
-
-    GIC_DIST_ACTIVE_CLEAR(_gic_table[index].dist_hw_base, irq) = mask;
-}
-
-void arm_gic_set_cpu(rt_uint32_t index, int irq, unsigned int cpumask)
-{
-    rt_uint32_t old_tgt;
-
-    RT_ASSERT(index < ARM_GIC_MAX_NR);
-
-    irq = irq - _gic_table[index].offset;
-    RT_ASSERT(irq >= 0);
-
-    old_tgt = GIC_DIST_TARGET(_gic_table[index].dist_hw_base, irq);
-
-    old_tgt &= ~(0x0FFUL << ((irq % 4)*8));
-    old_tgt |=   cpumask << ((irq % 4)*8);
-
-    GIC_DIST_TARGET(_gic_table[index].dist_hw_base, irq) = old_tgt;
-}
-
-void arm_gic_umask(rt_uint32_t index, int irq)
-{
-    rt_uint32_t mask = 1 << (irq % 32);
-
-    RT_ASSERT(index < ARM_GIC_MAX_NR);
-
-    irq = irq - _gic_table[index].offset;
-    RT_ASSERT(irq >= 0);
-
-    GIC_DIST_ENABLE_SET(_gic_table[index].dist_hw_base, irq) = mask;
-}
-
-void arm_gic_dump_type(rt_uint32_t index)
-{
-    unsigned int gic_type;
-
-    gic_type = GIC_DIST_TYPE(_gic_table[index].dist_hw_base);
-    rt_kprintf("GICv%d on %p, max IRQs: %d, %s security extension(%08x)\n",
-               (GIC_DIST_ICPIDR2(_gic_table[index].dist_hw_base) >> 4) & 0xf,
-               _gic_table[index].dist_hw_base,
-               _gic_max_irq,
-               gic_type & (1 << 10) ? "has" : "no",
-               gic_type);
-}
-
-void arm_gic_dump(rt_uint32_t index)
-{
-    unsigned int i, k;
-
-    k = GIC_CPU_HIGHPRI(_gic_table[index].cpu_hw_base);
-    rt_kprintf("--- high pending priority: %d(%08x)\n", k, k);
-    rt_kprintf("--- hw mask ---\n");
-    for (i = 0; i < _gic_max_irq / 32; i++)
-    {
-        rt_kprintf("0x%08x, ",
-                   GIC_DIST_ENABLE_SET(_gic_table[index].dist_hw_base,
-                                       i * 32));
-    }
-    rt_kprintf("\n--- hw pending ---\n");
-    for (i = 0; i < _gic_max_irq / 32; i++)
-    {
-        rt_kprintf("0x%08x, ",
-                   GIC_DIST_PENDING_SET(_gic_table[index].dist_hw_base,
-                                        i * 32));
-    }
-    rt_kprintf("\n--- hw active ---\n");
-    for (i = 0; i < _gic_max_irq / 32; i++)
-    {
-        rt_kprintf("0x%08x, ",
-                   GIC_DIST_ACTIVE_SET(_gic_table[index].dist_hw_base,
-                                       i * 32));
-    }
-    rt_kprintf("\n");
-}
-#ifdef RT_USING_FINSH
-#include <finsh.h>
-FINSH_FUNCTION_EXPORT_ALIAS(arm_gic_dump, gic, show gic status);
-#endif
-
-int arm_gic_dist_init(rt_uint32_t index, rt_uint32_t dist_base, int irq_start)
-{
-    unsigned int gic_type, i;
-    rt_uint32_t cpumask = 1 << 0;
-
-    RT_ASSERT(index < ARM_GIC_MAX_NR);
-
-    _gic_table[index].dist_hw_base = dist_base;
-    _gic_table[index].offset = irq_start;
-
-    /* Find out how many interrupts are supported. */
-    gic_type = GIC_DIST_TYPE(dist_base);
-    _gic_max_irq = ((gic_type & 0x1f) + 1) * 32;
-
-    /*
-     * The GIC only supports up to 1020 interrupt sources.
-     * Limit this to either the architected maximum, or the
-     * platform maximum.
-     */
-    if (_gic_max_irq > 1020)
-        _gic_max_irq = 1020;
-    if (_gic_max_irq > ARM_GIC_NR_IRQS)
-        _gic_max_irq = ARM_GIC_NR_IRQS;
-
-#ifndef RT_PRETENT_AS_CPU0
-    /* If we are run on the second core, the GIC should have already been setup
-     * by BootStrapProcessor. */
-    if ((rt_cpu_get_smp_id() & 0xF) != 0)
-        return 0;
-#endif
-
-    cpumask |= cpumask << 8;
-    cpumask |= cpumask << 16;
-
-    GIC_DIST_CTRL(dist_base) = 0x0;
-
-    /* Set all global interrupts to be level triggered, active low. */
-    for (i = 32; i < _gic_max_irq; i += 16)
-        GIC_DIST_CONFIG(dist_base, i) = 0x0;
-
-    /* Set all global interrupts to this CPU only. */
-    for (i = 32; i < _gic_max_irq; i += 4)
-        GIC_DIST_TARGET(dist_base, i) = cpumask;
-
-    /* Set priority on all interrupts. */
-    for (i = 0; i < _gic_max_irq; i += 4)
-        GIC_DIST_PRI(dist_base, i) = 0xa0a0a0a0;
-
-    /* Disable all interrupts. */
-    for (i = 0; i < _gic_max_irq; i += 32)
-        GIC_DIST_ENABLE_CLEAR(dist_base, i) = 0xffffffff;
-    /* All interrupts defaults to IGROUP1(IRQ). */
-    for (i = 0; i < _gic_max_irq; i += 32)
-        GIC_DIST_IGROUP(dist_base, i) = 0xffffffff;
-
-    /* Enable group0 and group1 interrupt forwarding. */
-    GIC_DIST_CTRL(dist_base) = 0x03;
-
-    return 0;
-}
-
-int arm_gic_cpu_init(rt_uint32_t index, rt_uint32_t cpu_base)
-{
-    RT_ASSERT(index < ARM_GIC_MAX_NR);
-
-    _gic_table[index].cpu_hw_base = cpu_base;
-
-#ifndef RT_PRETENT_AS_CPU0
-    /* If we are run on the second core, the GIC should have already been setup
-     * by BootStrapProcessor. */
-    if ((rt_cpu_get_smp_id() & 0xF) != 0)
-        return 0;
-#endif
-
-    GIC_CPU_PRIMASK(cpu_base) = 0xf0;
-    /* Enable CPU interrupt */
-    GIC_CPU_CTRL(cpu_base) = 0x01;
-
-    return 0;
-}
-
-void arm_gic_set_group(rt_uint32_t index, int vector, int group)
-{
-    /* As for GICv2, there are only group0 and group1. */
-    RT_ASSERT(group <= 1);
-    RT_ASSERT(vector < _gic_max_irq);
-
-    if (group == 0)
-    {
-        GIC_DIST_IGROUP(_gic_table[index].dist_hw_base,
-                        vector) &= ~(1 << (vector % 32));
-    }
-    else if (group == 1)
-    {
-        GIC_DIST_IGROUP(_gic_table[index].dist_hw_base,
-                        vector) |=  (1 << (vector % 32));
-    }
-}
-
-void arm_gic_trigger(rt_uint32_t index, int target_cpu, int irq)
-{
-    unsigned int reg;
-
-    RT_ASSERT(irq <= 15);
-    RT_ASSERT(target_cpu <= 255);
-
-    reg = (target_cpu << 16) | irq;
-    GIC_DIST_SOFTINT(_gic_table[index].dist_hw_base) = reg;
-}
-
-void arm_gic_clear_sgi(rt_uint32_t index, int target_cpu, int irq)
-{
-    RT_ASSERT(irq <= 15);
-    RT_ASSERT(target_cpu <= 255);
-
-    GIC_DIST_CPENDSGI(_gic_table[index].dist_hw_base, irq) = target_cpu << (irq % 4);
-}
diff --git a/libcpu/arm/realview-a8-vmm/gic.h b/libcpu/arm/realview-a8-vmm/gic.h
deleted file mode 100644
index 7c781ad4d9..0000000000
--- a/libcpu/arm/realview-a8-vmm/gic.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2013-07-20     Bernard      first version
- */
-
-#ifndef __GIC_H__
-#define __GIC_H__
-
-int arm_gic_dist_init(rt_uint32_t index, rt_uint32_t dist_base, int irq_start);
-int arm_gic_cpu_init(rt_uint32_t index, rt_uint32_t cpu_base);
-
-void arm_gic_mask(rt_uint32_t index, int irq);
-void arm_gic_umask(rt_uint32_t index, int irq);
-void arm_gic_set_cpu(rt_uint32_t index, int irq, unsigned int cpumask);
-void arm_gic_set_group(rt_uint32_t index, int vector, int group);
-
-int arm_gic_get_active_irq(rt_uint32_t index);
-void arm_gic_ack(rt_uint32_t index, int irq);
-
-void arm_gic_trigger(rt_uint32_t index, int target_cpu, int irq);
-void arm_gic_clear_sgi(rt_uint32_t index, int target_cpu, int irq);
-
-void arm_gic_dump_type(rt_uint32_t index);
-
-#endif
-
diff --git a/libcpu/arm/realview-a8-vmm/interrupt.c b/libcpu/arm/realview-a8-vmm/interrupt.c
deleted file mode 100644
index e846880589..0000000000
--- a/libcpu/arm/realview-a8-vmm/interrupt.c
+++ /dev/null
@@ -1,126 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2013-07-06     Bernard      first version
- * 2014-04-03     Grissiom     port to VMM
- */
-
-#include <rthw.h>
-#include <rtthread.h>
-#include "realview.h"
-#include "gic.h"
-
-#define MAX_HANDLERS                NR_IRQS_PBA8
-
-extern volatile rt_atomic_t rt_interrupt_nest;
-
-/* exception and interrupt handler table */
-struct rt_irq_desc isr_table[MAX_HANDLERS];
-
-/* Those varibles will be accessed in ISR, so we need to share them. */
-rt_uint32_t rt_interrupt_from_thread rt_section(".bss.share.int");
-rt_uint32_t rt_interrupt_to_thread rt_section(".bss.share.int");
-rt_uint32_t rt_thread_switch_interrupt_flag rt_section(".bss.share.int");
-
-const unsigned int VECTOR_BASE = 0x00;
-extern void rt_cpu_vector_set_base(unsigned int addr);
-extern int system_vectors;
-
-static void rt_hw_vector_init(void)
-{
-
-}
-
-/**
- * This function will initialize hardware interrupt
- */
-void rt_hw_interrupt_init(void)
-{
-    rt_uint32_t gic_cpu_base;
-    rt_uint32_t gic_dist_base;
-
-    /* initialize vector table */
-    rt_hw_vector_init();
-
-    /* initialize exceptions table */
-    rt_memset(isr_table, 0x00, sizeof(isr_table));
-
-    /* initialize ARM GIC */
-    gic_dist_base = REALVIEW_GIC_DIST_BASE;
-    gic_cpu_base = REALVIEW_GIC_CPU_BASE;
-
-    arm_gic_dist_init(0, gic_dist_base, 0);
-    arm_gic_cpu_init(0, gic_cpu_base);
-    /*arm_gic_dump_type(0);*/
-
-    /* init interrupt nest, and context in thread sp */
-    rt_interrupt_nest = 0;
-    rt_interrupt_from_thread = 0;
-    rt_interrupt_to_thread = 0;
-    rt_thread_switch_interrupt_flag = 0;
-}
-
-/**
- * This function will mask a interrupt.
- * @param vector the interrupt number
- */
-void rt_hw_interrupt_mask(int vector)
-{
-    arm_gic_mask(0, vector);
-}
-
-/**
- * This function will un-mask a interrupt.
- * @param vector the interrupt number
- */
-void rt_hw_interrupt_umask(int vector)
-{
-    arm_gic_umask(0, vector);
-}
-
-/**
- * This function will install a interrupt service routine to a interrupt.
- * @param vector the interrupt number
- * @param new_handler the interrupt service routine to be installed
- * @param old_handler the old interrupt service routine
- */
-rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
-        void *param, const char *name)
-{
-    rt_isr_handler_t old_handler = RT_NULL;
-
-    if (vector < MAX_HANDLERS)
-    {
-        old_handler = isr_table[vector].handler;
-
-        if (handler != RT_NULL)
-        {
-#ifdef RT_USING_INTERRUPT_INFO
-            rt_strncpy(isr_table[vector].name, name, RT_NAME_MAX);
-#endif /* RT_USING_INTERRUPT_INFO */
-            isr_table[vector].handler = handler;
-            isr_table[vector].param = param;
-        }
-    }
-
-    return old_handler;
-}
-
-/**
- * Trigger a software IRQ
- *
- * Since we are running in single core, the target CPU are always CPU0.
- */
-void rt_hw_interrupt_trigger(int vector)
-{
-    arm_gic_trigger(0, 1, vector);
-}
-
-void rt_hw_interrupt_clear(int vector)
-{
-    arm_gic_clear_sgi(0, 1, vector);
-}
diff --git a/libcpu/arm/realview-a8-vmm/interrupt.h b/libcpu/arm/realview-a8-vmm/interrupt.h
deleted file mode 100644
index 90f392f407..0000000000
--- a/libcpu/arm/realview-a8-vmm/interrupt.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2013-07-06     Bernard      first version
- */
-
-#ifndef __INTERRUPT_H__
-#define __INTERRUPT_H__
-
-#define INT_IRQ     0x00
-#define INT_FIQ     0x01
-
-#define INTC_REVISION(hw_base)          REG32((hw_base) + 0x0)
-#define INTC_SYSCONFIG(hw_base)         REG32((hw_base) + 0x10)
-#define INTC_SYSSTATUS(hw_base)         REG32((hw_base) + 0x14)
-#define INTC_SIR_IRQ(hw_base)           REG32((hw_base) + 0x40)
-#define INTC_SIR_FIQ(hw_base)           REG32((hw_base) + 0x44)
-#define INTC_CONTROL(hw_base)           REG32((hw_base) + 0x48)
-#define INTC_PROTECTION(hw_base)        REG32((hw_base) + 0x4c)
-#define INTC_IDLE(hw_base)              REG32((hw_base) + 0x50)
-#define INTC_IRQ_PRIORITY(hw_base)      REG32((hw_base) + 0x60)
-#define INTC_FIQ_PRIORITY(hw_base)      REG32((hw_base) + 0x64)
-#define INTC_THRESHOLD(hw_base)         REG32((hw_base) + 0x68)
-#define INTC_SICR(hw_base)              REG32((hw_base) + 0x6c)
-#define INTC_SCR(hw_base, n)            REG32((hw_base) + 0x70 + ((n) * 0x04))
-#define INTC_ITR(hw_base, n)            REG32((hw_base) + 0x80 + ((n) * 0x20))
-#define INTC_MIR(hw_base, n)            REG32((hw_base) + 0x84 + ((n) * 0x20))
-#define INTC_MIR_CLEAR(hw_base, n)      REG32((hw_base) + 0x88 + ((n) * 0x20))
-#define INTC_MIR_SET(hw_base, n)        REG32((hw_base) + 0x8c + ((n) * 0x20))
-#define INTC_ISR_SET(hw_base, n)        REG32((hw_base) + 0x90 + ((n) * 0x20))
-#define INTC_ISR_CLEAR(hw_base, n)      REG32((hw_base) + 0x94 + ((n) * 0x20))
-#define INTC_PENDING_IRQ(hw_base, n)    REG32((hw_base) + 0x98 + ((n) * 0x20))
-#define INTC_PENDING_FIQ(hw_base, n)    REG32((hw_base) + 0x9c + ((n) * 0x20))
-#define INTC_ILR(hw_base, n)            REG32((hw_base) + 0x100 + ((n) * 0x04))
-
-void rt_hw_interrupt_control(int vector, int priority, int route);
-int rt_hw_interrupt_get_active(int fiq_irq);
-void rt_hw_interrupt_ack(int fiq_irq);
-void rt_hw_interrupt_trigger(int vector);
-void rt_hw_interrupt_clear(int vector);
-
-#endif
diff --git a/libcpu/arm/realview-a8-vmm/mmu.c b/libcpu/arm/realview-a8-vmm/mmu.c
deleted file mode 100644
index f4d6068099..0000000000
--- a/libcpu/arm/realview-a8-vmm/mmu.c
+++ /dev/null
@@ -1,203 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2012-01-10     bernard      porting to AM1808
- */
-
-#include <rtthread.h>
-#include <rthw.h>
-#include <board.h>
-
-#include "cp15.h"
-
-#define DESC_SEC       (0x2)
-#define CB             (3<<2)  //cache_on, write_back
-#define CNB            (2<<2)  //cache_on, write_through
-#define NCB            (1<<2)  //cache_off,WR_BUF on
-#define NCNB           (0<<2)  //cache_off,WR_BUF off
-#define AP_RW          (3<<10) //supervisor=RW, user=RW
-#define AP_RO          (2<<10) //supervisor=RW, user=RO
-#define XN             (1<<4)  // eXecute Never
-
-#define DOMAIN_FAULT   (0x0)
-#define DOMAIN_CHK     (0x1)
-#define DOMAIN_NOTCHK  (0x3)
-#define DOMAIN0        (0x0<<5)
-#define DOMAIN1        (0x1<<5)
-
-#define DOMAIN0_ATTR   (DOMAIN_CHK<<0)
-#define DOMAIN1_ATTR   (DOMAIN_FAULT<<2)
-
-/* Read/Write, cache, write back */
-#define RW_CB          (AP_RW|DOMAIN0|CB|DESC_SEC)
-/* Read/Write, cache, write through */
-#define RW_CNB         (AP_RW|DOMAIN0|CNB|DESC_SEC)
-/* Read/Write without cache and write buffer */
-#define RW_NCNB        (AP_RW|DOMAIN0|NCNB|DESC_SEC)
-/* Read/Write without cache and write buffer, no execute */
-#define RW_NCNBXN      (AP_RW|DOMAIN0|NCNB|DESC_SEC|XN)
-/* Read/Write without cache and write buffer */
-#define RW_FAULT       (AP_RW|DOMAIN1|NCNB|DESC_SEC)
-
-/* dump 2nd level page table */
-void rt_hw_cpu_dump_page_table_2nd(rt_uint32_t *ptb)
-{
-    int i;
-    int fcnt = 0;
-
-    for (i = 0; i < 256; i++)
-    {
-        rt_uint32_t pte2 = ptb[i];
-        if ((pte2 & 0x3) == 0)
-        {
-            if (fcnt == 0)
-                rt_kprintf("    ");
-            rt_kprintf("%04x: ", i);
-            fcnt++;
-            if (fcnt == 16)
-            {
-                rt_kprintf("fault\n");
-                fcnt = 0;
-            }
-            continue;
-        }
-        if (fcnt != 0)
-        {
-            rt_kprintf("fault\n");
-            fcnt = 0;
-        }
-
-        rt_kprintf("    %04x: %x: ", i, pte2);
-        if ((pte2 & 0x3) == 0x1)
-        {
-            rt_kprintf("L,ap:%x,xn:%d,texcb:%02x\n",
-                       ((pte2 >> 7) | (pte2 >> 4))& 0xf,
-                       (pte2 >> 15) & 0x1,
-                       ((pte2 >> 10) | (pte2 >> 2)) & 0x1f);
-        }
-        else
-        {
-            rt_kprintf("S,ap:%x,xn:%d,texcb:%02x\n",
-                       ((pte2 >> 7) | (pte2 >> 4))& 0xf, pte2 & 0x1,
-                       ((pte2 >> 4) | (pte2 >> 2)) & 0x1f);
-        }
-    }
-}
-
-void rt_hw_cpu_dump_page_table(rt_uint32_t *ptb)
-{
-    int i;
-    int fcnt = 0;
-
-    rt_kprintf("page table@%p\n", ptb);
-    for (i = 0; i < 1024*4; i++)
-    {
-        rt_uint32_t pte1 = ptb[i];
-        if ((pte1 & 0x3) == 0)
-        {
-            rt_kprintf("%03x: ", i);
-            fcnt++;
-            if (fcnt == 16)
-            {
-                rt_kprintf("fault\n");
-                fcnt = 0;
-            }
-            continue;
-        }
-        if (fcnt != 0)
-        {
-            rt_kprintf("fault\n");
-            fcnt = 0;
-        }
-
-        rt_kprintf("%03x: %08x: ", i, pte1);
-        if ((pte1 & 0x3) == 0x3)
-        {
-            rt_kprintf("LPAE\n");
-        }
-        else if ((pte1 & 0x3) == 0x1)
-        {
-            rt_kprintf("pte,ns:%d,domain:%d\n",
-                       (pte1 >> 3) & 0x1, (pte1 >> 5) & 0xf);
-            /*
-             *rt_hw_cpu_dump_page_table_2nd((void*)((pte1 & 0xfffffc000)
-             *                               - 0x80000000 + 0xC0000000));
-             */
-        }
-        else if (pte1 & (1 << 18))
-        {
-            rt_kprintf("super section,ns:%d,ap:%x,xn:%d,texcb:%02x\n",
-                       (pte1 >> 19) & 0x1,
-                       ((pte1 >> 13) | (pte1 >> 10))& 0xf,
-                       (pte1 >> 4) & 0x1,
-                       ((pte1 >> 10) | (pte1 >> 2)) & 0x1f);
-        }
-        else
-        {
-            rt_kprintf("section,ns:%d,ap:%x,"
-                       "xn:%d,texcb:%02x,domain:%d\n",
-                       (pte1 >> 19) & 0x1,
-                       ((pte1 >> 13) | (pte1 >> 10))& 0xf,
-                       (pte1 >> 4) & 0x1,
-                       (((pte1 & (0x7 << 12)) >> 10) |
-                        ((pte1 &        0x0c) >>  2)) & 0x1f,
-                       (pte1 >> 5) & 0xf);
-        }
-    }
-}
-
-/* level1 page table, each entry for 1MB memory. */
-volatile static unsigned long MMUTable[4*1024] __attribute__((aligned(16*1024)));
-void rt_hw_mmu_setmtt(rt_uint32_t vaddrStart,
-                      rt_uint32_t vaddrEnd,
-                      rt_uint32_t paddrStart,
-                      rt_uint32_t attr)
-{
-    volatile rt_uint32_t *pTT;
-    volatile int i, nSec;
-    pTT  = (rt_uint32_t *)MMUTable + (vaddrStart >> 20);
-    nSec = (vaddrEnd >> 20) - (vaddrStart >> 20);
-    for(i = 0; i <= nSec; i++)
-    {
-        *pTT = attr | (((paddrStart >> 20) + i) << 20);
-        pTT++;
-    }
-}
-
-unsigned long rt_hw_set_domain_register(unsigned long domain_val)
-{
-    unsigned long old_domain;
-
-    asm volatile ("mrc p15, 0, %0, c3, c0\n" : "=r" (old_domain));
-    asm volatile ("mcr p15, 0, %0, c3, c0\n" : :"r" (domain_val) : "memory");
-
-    return old_domain;
-}
-
-void rt_hw_mmu_init(void)
-{
-    rt_hw_cpu_dcache_disable();
-    rt_hw_cpu_icache_disable();
-    rt_cpu_mmu_disable();
-
-    /* set page table */
-    /* 4G 1:1 memory */
-    rt_hw_mmu_setmtt(0, 0xffffffff-1, 0, RW_CB);
-    /* IO memory region */
-    rt_hw_mmu_setmtt(0x44000000, 0x80000000-1, 0x44000000, RW_NCNBXN);
-
-    /*rt_hw_cpu_dump_page_table(MMUTable);*/
-    rt_hw_set_domain_register(0x55555555);
-
-    rt_cpu_tlb_set(MMUTable);
-
-    rt_cpu_mmu_enable();
-
-    rt_hw_cpu_icache_enable();
-    rt_hw_cpu_dcache_enable();
-}
-
diff --git a/libcpu/arm/realview-a8-vmm/pmu.c b/libcpu/arm/realview-a8-vmm/pmu.c
deleted file mode 100644
index 2b9165cc8b..0000000000
--- a/libcpu/arm/realview-a8-vmm/pmu.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- */
-#include <rtthread.h>
-#include "pmu.h"
-
-void rt_hw_pmu_dump_feature(void)
-{
-    unsigned long reg;
-
-    reg = rt_hw_pmu_get_control();
-    rt_kprintf("ARM PMU Implementor: %c, ID code: %02x, %d counters\n",
-               reg >> 24, (reg >> 16) & 0xff, (reg >> 11) & 0x1f);
-    RT_ASSERT(ARM_PMU_CNTER_NR == ((reg >> 11) & 0x1f));
-}
diff --git a/libcpu/arm/realview-a8-vmm/pmu.h b/libcpu/arm/realview-a8-vmm/pmu.h
deleted file mode 100644
index 64a74b5d39..0000000000
--- a/libcpu/arm/realview-a8-vmm/pmu.h
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- */
-#ifndef __PMU_H__
-#define __PMU_H__
-
-#include "board.h"
-
-/* Number of counters */
-#define ARM_PMU_CNTER_NR 4
-
-enum rt_hw_pmu_event_type {
-    ARM_PMU_EVENT_PMNC_SW_INCR      = 0x00,
-    ARM_PMU_EVENT_L1_ICACHE_REFILL  = 0x01,
-    ARM_PMU_EVENT_ITLB_REFILL       = 0x02,
-    ARM_PMU_EVENT_L1_DCACHE_REFILL  = 0x03,
-    ARM_PMU_EVENT_L1_DCACHE_ACCESS  = 0x04,
-    ARM_PMU_EVENT_DTLB_REFILL       = 0x05,
-    ARM_PMU_EVENT_MEM_READ          = 0x06,
-    ARM_PMU_EVENT_MEM_WRITE         = 0x07,
-    ARM_PMU_EVENT_INSTR_EXECUTED    = 0x08,
-    ARM_PMU_EVENT_EXC_TAKEN         = 0x09,
-    ARM_PMU_EVENT_EXC_EXECUTED      = 0x0A,
-    ARM_PMU_EVENT_CID_WRITE         = 0x0B,
-};
-
-/* Enable bit */
-#define ARM_PMU_PMCR_E   (0x01 << 0)
-/* Event counter reset */
-#define ARM_PMU_PMCR_P   (0x01 << 1)
-/* Cycle counter reset */
-#define ARM_PMU_PMCR_C   (0x01 << 2)
-/* Cycle counter divider */
-#define ARM_PMU_PMCR_D   (0x01 << 3)
-
-#ifdef __GNUC__
-rt_inline void rt_hw_pmu_enable_cnt(int divide64)
-{
-    unsigned long pmcr;
-    unsigned long pmcntenset;
-
-    asm volatile ("mrc p15, 0, %0, c9, c12, 0" : "=r"(pmcr));
-    pmcr |= ARM_PMU_PMCR_E | ARM_PMU_PMCR_P | ARM_PMU_PMCR_C;
-    if (divide64)
-        pmcr |= ARM_PMU_PMCR_D;
-    else
-        pmcr &= ~ARM_PMU_PMCR_D;
-    asm volatile ("mcr p15, 0, %0, c9, c12, 0" :: "r"(pmcr));
-
-    /* enable all the counters */
-    pmcntenset = ~0;
-    asm volatile ("mcr p15, 0, %0, c9, c12, 1" :: "r"(pmcntenset));
-    /* clear overflows(just in case) */
-    asm volatile ("mcr p15, 0, %0, c9, c12, 3" :: "r"(pmcntenset));
-}
-
-rt_inline unsigned long rt_hw_pmu_get_control(void)
-{
-    unsigned long pmcr;
-    asm ("mrc p15, 0, %0, c9, c12, 0" : "=r"(pmcr));
-    return pmcr;
-}
-
-rt_inline unsigned long rt_hw_pmu_get_ceid(void)
-{
-    unsigned long reg;
-    /* only PMCEID0 is supported, PMCEID1 is RAZ. */
-    asm ("mrc p15, 0, %0, c9, c12, 6" : "=r"(reg));
-    return reg;
-}
-
-rt_inline unsigned long rt_hw_pmu_get_cnten(void)
-{
-    unsigned long pmcnt;
-    asm ("mrc p15, 0, %0, c9, c12, 1" : "=r"(pmcnt));
-    return pmcnt;
-}
-
-rt_inline void rt_hw_pmu_reset_cycle(void)
-{
-    unsigned long pmcr;
-
-    asm volatile ("mrc p15, 0, %0, c9, c12, 0" : "=r"(pmcr));
-    pmcr |= ARM_PMU_PMCR_C;
-    asm volatile ("mcr p15, 0, %0, c9, c12, 0" :: "r"(pmcr));
-    asm volatile ("isb");
-}
-
-rt_inline void rt_hw_pmu_reset_event(void)
-{
-    unsigned long pmcr;
-
-    asm volatile ("mrc p15, 0, %0, c9, c12, 0" : "=r"(pmcr));
-    pmcr |= ARM_PMU_PMCR_P;
-    asm volatile ("mcr p15, 0, %0, c9, c12, 0" :: "r"(pmcr));
-    asm volatile ("isb");
-}
-
-rt_inline unsigned long rt_hw_pmu_get_cycle(void)
-{
-    unsigned long cyc;
-    asm volatile ("isb");
-    asm volatile ("mrc  p15, 0, %0, c9, c13, 0" : "=r"(cyc));
-    return cyc;
-}
-
-rt_inline void rt_hw_pmu_select_counter(int idx)
-{
-    RT_ASSERT(idx < ARM_PMU_CNTER_NR);
-
-    asm volatile ("mcr p15, 0, %0, c9, c12, 5" : : "r"(idx));
-    /* Linux add an isb here, don't know why here. */
-    asm volatile ("isb");
-}
-
-rt_inline void rt_hw_pmu_select_event(int idx,
-                                      enum rt_hw_pmu_event_type eve)
-{
-    RT_ASSERT(idx < ARM_PMU_CNTER_NR);
-
-    rt_hw_pmu_select_counter(idx);
-    asm volatile ("mcr p15, 0, %0, c9, c13, 1" : : "r"(eve));
-}
-
-rt_inline unsigned long rt_hw_pmu_read_counter(int idx)
-{
-    unsigned long reg;
-
-    rt_hw_pmu_select_counter(idx);
-    asm volatile ("isb");
-    asm volatile ("mrc p15, 0, %0, c9, c13, 2" : "=r"(reg));
-    return reg;
-}
-
-rt_inline unsigned long rt_hw_pmu_get_ovsr(void)
-{
-    unsigned long reg;
-    asm volatile ("isb");
-    asm ("mrc  p15, 0, %0, c9, c12, 3" : "=r"(reg));
-    return reg;
-}
-
-rt_inline void rt_hw_pmu_clear_ovsr(unsigned long reg)
-{
-    asm ("mcr  p15, 0, %0, c9, c12, 3" : : "r"(reg));
-    asm volatile ("isb");
-}
-
-#endif
-
-void rt_hw_pmu_dump_feature(void);
-
-#endif /* end of include guard: __PMU_H__ */
-
diff --git a/libcpu/arm/realview-a8-vmm/stack.c b/libcpu/arm/realview-a8-vmm/stack.c
deleted file mode 100644
index 8cf73ac05c..0000000000
--- a/libcpu/arm/realview-a8-vmm/stack.c
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2011-09-23     Bernard      the first version
- * 2011-10-05     Bernard      add thumb mode
- */
-#include <rtthread.h>
-#include <board.h>
-
-/**
- * @addtogroup AM33xx
- */
-/*@{*/
-
-/**
- * This function will initialize thread stack
- *
- * @param tentry the entry of thread
- * @param parameter the parameter of entry
- * @param stack_addr the beginning stack address
- * @param texit the function will be called when thread exit
- *
- * @return stack address
- */
-rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
-                             rt_uint8_t *stack_addr, void *texit)
-{
-    rt_uint32_t *stk;
-
-    stack_addr += sizeof(rt_uint32_t);
-    stack_addr  = (rt_uint8_t *)RT_ALIGN_DOWN((rt_uint32_t)stack_addr, 8);
-    stk      = (rt_uint32_t *)stack_addr;
-    *(--stk) = (rt_uint32_t)tentry;         /* entry point */
-    *(--stk) = (rt_uint32_t)texit;          /* lr */
-    *(--stk) = 0xdeadbeef;                  /* r12 */
-    *(--stk) = 0xdeadbeef;                  /* r11 */
-    *(--stk) = 0xdeadbeef;                  /* r10 */
-    *(--stk) = 0xdeadbeef;                  /* r9 */
-    *(--stk) = 0xdeadbeef;                  /* r8 */
-    *(--stk) = 0xdeadbeef;                  /* r7 */
-    *(--stk) = 0xdeadbeef;                  /* r6 */
-    *(--stk) = 0xdeadbeef;                  /* r5 */
-    *(--stk) = 0xdeadbeef;                  /* r4 */
-    *(--stk) = 0xdeadbeef;                  /* r3 */
-    *(--stk) = 0xdeadbeef;                  /* r2 */
-    *(--stk) = 0xdeadbeef;                  /* r1 */
-    *(--stk) = (rt_uint32_t)parameter;      /* r0 : argument */
-
-    /* cpsr */
-    if ((rt_uint32_t)tentry & 0x01)
-        *(--stk) = SVCMODE | 0x20;          /* thumb mode */
-    else
-        *(--stk) = SVCMODE;                 /* arm mode   */
-
-    /* return task's current stack address */
-    return (rt_uint8_t *)stk;
-}
-
-/*@}*/
diff --git a/libcpu/arm/realview-a8-vmm/start_gcc.S b/libcpu/arm/realview-a8-vmm/start_gcc.S
deleted file mode 100644
index 768c01d700..0000000000
--- a/libcpu/arm/realview-a8-vmm/start_gcc.S
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * Copyright (c) 2006-2022, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2013-07-05     Bernard      the first version
- */
-
-#include <rtconfig.h>
-
-.equ Mode_USR,        0x10
-.equ Mode_FIQ,        0x11
-.equ Mode_IRQ,        0x12
-.equ Mode_SVC,        0x13
-.equ Mode_ABT,        0x17
-.equ Mode_UND,        0x1B
-.equ Mode_SYS,        0x1F
-
-.equ I_Bit,           0x80            @ when I bit is set, IRQ is disabled
-.equ F_Bit,           0x40            @ when F bit is set, FIQ is disabled
-
-.equ UND_Stack_Size,     0x00000000
-.equ SVC_Stack_Size,     0x00000100
-.equ ABT_Stack_Size,     0x00000000
-.equ RT_FIQ_STACK_PGSZ,  0x00000000
-.equ RT_IRQ_STACK_PGSZ,  0x00000100
-.equ USR_Stack_Size,     0x00000100
-
-#define ISR_Stack_Size  (UND_Stack_Size + SVC_Stack_Size + ABT_Stack_Size + \
-                 RT_FIQ_STACK_PGSZ + RT_IRQ_STACK_PGSZ)
-
-.section .data.share.isr
-/* stack */
-.globl stack_start
-.globl stack_top
-
-.align 3
-stack_start:
-.rept ISR_Stack_Size
-.byte 0
-.endr
-stack_top:
-
-.text
-/* reset entry */
-.globl _reset
-_reset:
-    /* set the cpu to SVC32 mode and disable interrupt */
-    mrs     r0, cpsr
-    bic     r0, r0, #0x1f
-    orr     r0, r0, #0x13
-    msr     cpsr_c, r0
-
-    /* setup stack */
-    bl      stack_setup
-
-    /* clear .bss */
-    mov     r0,#0                   /* get a zero                       */
-    ldr     r1,=__bss_start         /* bss start                        */
-    ldr     r2,=__bss_end           /* bss end                          */
-
-bss_loop:
-    cmp     r1,r2                   /* check if data to clear           */
-    strlo   r0,[r1],#4              /* clear 4 bytes                    */
-    blo     bss_loop                /* loop until done                  */
-
-    /* call C++ constructors of global objects                          */
-    ldr     r0, =__ctors_start__
-    ldr     r1, =__ctors_end__
-
-ctor_loop:
-    cmp     r0, r1
-    beq     ctor_end
-    ldr     r2, [r0], #4
-    stmfd   sp!, {r0-r1}
-    mov     lr, pc
-    bx      r2
-    ldmfd   sp!, {r0-r1}
-    b       ctor_loop
-ctor_end:
-
-    /* start RT-Thread Kernel */
-    ldr     pc, _rtthread_startup
-_rtthread_startup:
-    .word rtthread_startup
-
-stack_setup:
-    ldr     r0, =stack_top
-
-    @  Set the startup stack for svc
-    mov     sp, r0
-
-    @  Enter Undefined Instruction Mode and set its Stack Pointer
-    msr     cpsr_c, #Mode_UND|I_Bit|F_Bit
-    mov     sp, r0
-    sub     r0, r0, #UND_Stack_Size
-
-    @  Enter Abort Mode and set its Stack Pointer
-    msr     cpsr_c, #Mode_ABT|I_Bit|F_Bit
-    mov     sp, r0
-    sub     r0, r0, #ABT_Stack_Size
-
-    @  Enter FIQ Mode and set its Stack Pointer
-    msr     cpsr_c, #Mode_FIQ|I_Bit|F_Bit
-    mov     sp, r0
-    sub     r0, r0, #RT_FIQ_STACK_PGSZ
-
-    @  Enter IRQ Mode and set its Stack Pointer
-    msr     cpsr_c, #Mode_IRQ|I_Bit|F_Bit
-    mov     sp, r0
-    sub     r0, r0, #RT_IRQ_STACK_PGSZ
-
-    /* come back to SVC mode */
-    msr     cpsr_c, #Mode_SVC|I_Bit|F_Bit
-    bx      lr
-
-/* exception handlers: undef, swi, padt, dabt, resv, irq, fiq          */
-.section .text.isr, "ax"
-    .align  5
-.globl vector_fiq
-vector_fiq:
-    stmfd   sp!,{r0-r7,lr}
-    bl      rt_hw_trap_fiq
-    ldmfd   sp!,{r0-r7,lr}
-    subs    pc, lr, #4
-
-.globl      rt_interrupt_enter
-.globl      rt_interrupt_leave
-.globl      rt_thread_switch_interrupt_flag
-.globl      rt_interrupt_from_thread
-.globl      rt_interrupt_to_thread
-
-.globl      rt_current_thread
-.globl      vmm_thread
-.globl      vmm_virq_check
-
-    .align  5
-.globl vector_irq
-vector_irq:
-    stmfd   sp!, {r0-r12,lr}
-
-    bl      rt_interrupt_enter
-    bl      rt_hw_trap_irq
-    bl      rt_interrupt_leave
-
-    @ if rt_thread_switch_interrupt_flag set, jump to
-    @ rt_hw_context_switch_interrupt_do and don't return
-    ldr     r0, =rt_thread_switch_interrupt_flag
-    ldr     r1, [r0]
-    cmp     r1, #1
-    beq     rt_hw_context_switch_interrupt_do
-
-    ldmfd   sp!, {r0-r12,lr}
-    subs    pc,  lr, #4
-
-rt_hw_context_switch_interrupt_do:
-    mov     r1,  #0         @ clear flag
-    str     r1,  [r0]
-
-    mov     r1, sp          @ r1 point to {r0-r3} in stack
-    add     sp, sp, #4*4
-    ldmfd   sp!, {r4-r12,lr}@ reload saved registers
-    mrs     r0,  spsr       @ get cpsr of interrupt thread
-    sub     r2,  lr, #4     @ save old task's pc to r2
-
-    @ Switch to SVC mode with no interrupt. If the usr mode guest is
-    @ interrupted, this will just switch to the stack of kernel space.
-    @ save the registers in kernel space won't trigger data abort.
-    msr     cpsr_c, #I_Bit|F_Bit|Mode_SVC
-
-    stmfd   sp!, {r2}       @ push old task's pc
-    stmfd   sp!, {r4-r12,lr}@ push old task's lr,r12-r4
-    ldmfd   r1,  {r1-r4}    @ restore r0-r3 of the interrupt thread
-    stmfd   sp!, {r1-r4}    @ push old task's r0-r3
-    stmfd   sp!, {r0}       @ push old task's cpsr
-
-    ldr     r4,  =rt_interrupt_from_thread
-    ldr     r5,  [r4]
-    str     sp,  [r5]       @ store sp in preempted tasks's TCB
-
-    ldr     r6,  =rt_interrupt_to_thread
-    ldr     r6,  [r6]
-    ldr     sp,  [r6]       @ get new task's stack pointer
-
-    ldmfd   sp!, {r4}       @ pop new task's cpsr to spsr
-    msr     spsr_cxsf, r4
-
-    ldmfd   sp!, {r0-r12,lr,pc}^ @ pop new task's r0-r12,lr & pc, copy spsr to cpsr
-
-.macro push_svc_reg
-    sub     sp, sp, #17 * 4         @/* Sizeof(struct rt_hw_exp_stack)  */
-    stmia   sp, {r0 - r12}          @/* Calling r0-r12                  */
-    mov     r0, sp
-    mrs     r6, spsr                @/* Save CPSR                       */
-    str     lr, [r0, #15*4]         @/* Push PC                         */
-    str     r6, [r0, #16*4]         @/* Push CPSR                       */
-    cps     #Mode_SVC
-    str     sp, [r0, #13*4]         @/* Save calling SP                 */
-    str     lr, [r0, #14*4]         @/* Save calling PC                 */
-.endm
-
-    .align  5
-    .globl  vector_swi
-vector_swi:
-    push_svc_reg
-    bl      rt_hw_trap_swi
-    b       .
-
-    .align  5
-    .globl  vector_undef
-vector_undef:
-    push_svc_reg
-    bl      rt_hw_trap_undef
-    b       .
-
-    .align  5
-    .globl  vector_pabt
-vector_pabt:
-    push_svc_reg
-    bl      rt_hw_trap_pabt
-    b       .
-
-    .align  5
-    .globl  vector_dabt
-vector_dabt:
-    push_svc_reg
-    bl      rt_hw_trap_dabt
-    b       .
-
-    .align  5
-    .globl  vector_resv
-vector_resv:
-    push_svc_reg
-    bl      rt_hw_trap_resv
-    b       .
diff --git a/libcpu/arm/realview-a8-vmm/trap.c b/libcpu/arm/realview-a8-vmm/trap.c
deleted file mode 100644
index 407ffc856f..0000000000
--- a/libcpu/arm/realview-a8-vmm/trap.c
+++ /dev/null
@@ -1,187 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2013-07-20     Bernard      first version
- */
-
-#include <rtthread.h>
-#include <rthw.h>
-#include <board.h>
-
-#include "armv7.h"
-
-#include "gic.h"
-
-extern struct rt_thread *rt_current_thread;
-#if defined(RT_USING_FINSH) && defined(MSH_USING_BUILT_IN_COMMANDS)
-extern long list_thread(void);
-#endif
-
-/**
- * this function will show registers of CPU
- *
- * @param regs the registers point
- */
-void rt_hw_show_register(struct rt_hw_exp_stack *regs)
-{
-    rt_kprintf("Execption:\n");
-    rt_kprintf("r00:0x%08x r01:0x%08x r02:0x%08x r03:0x%08x\n", regs->r0, regs->r1, regs->r2, regs->r3);
-    rt_kprintf("r04:0x%08x r05:0x%08x r06:0x%08x r07:0x%08x\n", regs->r4, regs->r5, regs->r6, regs->r7);
-    rt_kprintf("r08:0x%08x r09:0x%08x r10:0x%08x\n", regs->r8, regs->r9, regs->r10);
-    rt_kprintf("fp :0x%08x ip :0x%08x\n", regs->fp, regs->ip);
-    rt_kprintf("sp :0x%08x lr :0x%08x pc :0x%08x\n", regs->sp, regs->lr, regs->pc);
-    rt_kprintf("cpsr:0x%08x\n", regs->cpsr);
-}
-
-/**
- * When comes across an instruction which it cannot handle,
- * it takes the undefined instruction trap.
- *
- * @param regs system registers
- *
- * @note never invoke this function in application
- */
-void rt_hw_trap_undef(struct rt_hw_exp_stack *regs)
-{
-    rt_kprintf("undefined instruction:\n");
-    rt_hw_show_register(regs);
-#if defined(RT_USING_FINSH) && defined(MSH_USING_BUILT_IN_COMMANDS)
-    list_thread();
-#endif
-    rt_hw_cpu_shutdown();
-}
-
-/**
- * The software interrupt instruction (SWI) is used for entering
- * Supervisor mode, usually to request a particular supervisor
- * function.
- *
- * @param regs system registers
- *
- * @note never invoke this function in application
- */
-void rt_hw_trap_swi(struct rt_hw_exp_stack *regs)
-{
-    rt_kprintf("software interrupt:\n");
-    rt_hw_show_register(regs);
-#if defined(RT_USING_FINSH) && defined(MSH_USING_BUILT_IN_COMMANDS)
-    list_thread();
-#endif
-    rt_hw_cpu_shutdown();
-}
-
-/**
- * An abort indicates that the current memory access cannot be completed,
- * which occurs during an instruction prefetch.
- *
- * @param regs system registers
- *
- * @note never invoke this function in application
- */
-void rt_hw_trap_pabt(struct rt_hw_exp_stack *regs)
-{
-    rt_kprintf("prefetch abort:\n");
-    rt_hw_show_register(regs);
-#if defined(RT_USING_FINSH) && defined(MSH_USING_BUILT_IN_COMMANDS)
-    list_thread();
-#endif
-    rt_hw_cpu_shutdown();
-}
-
-/**
- * An abort indicates that the current memory access cannot be completed,
- * which occurs during a data access.
- *
- * @param regs system registers
- *
- * @note never invoke this function in application
- */
-void rt_hw_trap_dabt(struct rt_hw_exp_stack *regs)
-{
-    rt_kprintf("data abort:");
-    rt_hw_show_register(regs);
-#if defined(RT_USING_FINSH) && defined(MSH_USING_BUILT_IN_COMMANDS)
-    list_thread();
-#endif
-    rt_hw_cpu_shutdown();
-}
-
-/**
- * Normally, system will never reach here
- *
- * @param regs system registers
- *
- * @note never invoke this function in application
- */
-void rt_hw_trap_resv(struct rt_hw_exp_stack *regs)
-{
-    rt_kprintf("reserved trap:\n");
-    rt_hw_show_register(regs);
-#if defined(RT_USING_FINSH) && defined(MSH_USING_BUILT_IN_COMMANDS)
-    list_thread();
-#endif
-    rt_hw_cpu_shutdown();
-}
-
-#define GIC_ACK_INTID_MASK                  0x000003ff
-
-void rt_hw_trap_irq(void)
-{
-    void *param;
-    unsigned long ir;
-    unsigned long fullir;
-    rt_isr_handler_t isr_func;
-    extern struct rt_irq_desc isr_table[];
-
-    fullir = arm_gic_get_active_irq(0);
-    ir = fullir & GIC_ACK_INTID_MASK;
-
-    if (ir == 1023)
-    {
-        /* Spurious interrupt */
-        return;
-    }
-
-    /* get interrupt service routine */
-    isr_func = isr_table[ir].handler;
-#ifdef RT_USING_INTERRUPT_INFO
-    isr_table[ir].counter++;
-#endif
-    if (isr_func)
-    {
-        /* Interrupt for myself. */
-        param = isr_table[ir].param;
-        /* turn to interrupt service routine */
-        isr_func(ir, param);
-    }
-
-    /* end of interrupt */
-    arm_gic_ack(0, fullir);
-}
-
-void rt_hw_trap_fiq(void)
-{
-    void *param;
-    unsigned long ir;
-    unsigned long fullir;
-    rt_isr_handler_t isr_func;
-    extern struct rt_irq_desc isr_table[];
-
-    fullir = arm_gic_get_active_irq(0);
-    ir = fullir & GIC_ACK_INTID_MASK;
-
-    /* get interrupt service routine */
-    isr_func = isr_table[ir].handler;
-    param = isr_table[ir].param;
-
-    /* turn to interrupt service routine */
-    isr_func(ir, param);
-
-    /* end of interrupt */
-    arm_gic_ack(0, fullir);
-}
-
diff --git a/libcpu/arm/realview-a8-vmm/vector_gcc.S b/libcpu/arm/realview-a8-vmm/vector_gcc.S
deleted file mode 100644
index 46fdf291d8..0000000000
--- a/libcpu/arm/realview-a8-vmm/vector_gcc.S
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (c) 2006-2022, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2013-07-05     Bernard      the first version
- */
-#include <rtconfig.h>
-
-.section .vectors, "ax"
-.code 32
-
-.globl system_vectors
-system_vectors:
-    ldr pc, _vector_reset
-    ldr pc, _vector_undef
-    ldr pc, _vector_swi
-    ldr pc, _vector_pabt
-    ldr pc, _vector_dabt
-    ldr pc, _vector_resv
-    ldr pc, _vector_irq
-    ldr pc, _vector_fiq
-
-.globl _reset
-.globl vector_undef
-.globl vector_swi
-.globl vector_pabt
-.globl vector_dabt
-.globl vector_resv
-.globl vector_irq
-.globl vector_fiq
-
-_vector_reset:
-    .word _reset
-_vector_undef:
-    .word vector_undef
-_vector_swi:
-    .word vector_swi
-_vector_pabt:
-    .word vector_pabt
-_vector_dabt:
-    .word vector_dabt
-_vector_resv:
-    .word vector_resv
-_vector_irq:
-    .word vector_irq
-_vector_fiq:
-    .word vector_fiq
-
-.balignl    16,0xdeadbeef