diff options
Diffstat (limited to 'libcpu/arm/am335x/mmu.c')
| -rw-r--r-- | libcpu/arm/am335x/mmu.c | 108 |
1 files changed, 54 insertions, 54 deletions
diff --git a/libcpu/arm/am335x/mmu.c b/libcpu/arm/am335x/mmu.c index babe825298..fbd886d0e6 100644 --- a/libcpu/arm/am335x/mmu.c +++ b/libcpu/arm/am335x/mmu.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2006-2018, RT-Thread Development Team + * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * @@ -22,122 +22,122 @@ extern void rt_cpu_tlb_set(register rt_uint32_t i); void mmu_disable_dcache() { - rt_cpu_dcache_disable(); + rt_cpu_dcache_disable(); } void mmu_enable_dcache() { - rt_hw_cpu_dcache_enable(); + rt_hw_cpu_dcache_enable(); } void mmu_disable_icache() { - rt_cpu_icache_disable(); + rt_cpu_icache_disable(); } void mmu_enable_icache() { - rt_hw_cpu_icache_enable(); + rt_hw_cpu_icache_enable(); } void mmu_disable() { - rt_cpu_mmu_disable(); + rt_cpu_mmu_disable(); } void mmu_enable() { - rt_cpu_mmu_enable(); + rt_cpu_mmu_enable(); } void mmu_setttbase(register rt_uint32_t i) { - register rt_uint32_t value; + register rt_uint32_t value; /* Invalidates all TLBs.Domain access is selected as * client by configuring domain access register, * in that case access controlled by permission value * set by page table entry */ - value = 0; - asm volatile ("mcr p15, 0, %0, c8, c7, 0"::"r"(value)); + value = 0; + asm volatile ("mcr p15, 0, %0, c8, c7, 0"::"r"(value)); - value = 0x55555555; - asm volatile ("mcr p15, 0, %0, c3, c0, 0"::"r"(value)); - - rt_cpu_tlb_set(i); + value = 0x55555555; + asm volatile ("mcr p15, 0, %0, c3, c0, 0"::"r"(value)); + + rt_cpu_tlb_set(i); } void mmu_set_domain(register rt_uint32_t i) { - asm volatile ("mcr p15,0, %0, c3, c0, 0": :"r" (i)); + asm volatile ("mcr p15,0, %0, c3, c0, 0": :"r" (i)); } void mmu_enable_alignfault() { - register rt_uint32_t i; + register rt_uint32_t i; - /* read control register */ - asm volatile ("mrc p15, 0, %0, c1, c0, 0":"=r" (i)); + /* read control register */ + asm volatile ("mrc p15, 0, %0, c1, c0, 0":"=r" (i)); - i |= (1 << 1); + i |= (1 << 1); - /* write back to control register */ - asm volatile ("mcr p15, 0, %0, c1, c0, 0": :"r" (i)); + /* write back to control register */ + asm volatile ("mcr p15, 0, %0, c1, c0, 0": :"r" (i)); } void mmu_disable_alignfault() { - register rt_uint32_t i; + register rt_uint32_t i; - /* read control register */ - asm volatile ("mrc p15, 0, %0, c1, c0, 0":"=r" (i)); + /* read control register */ + asm volatile ("mrc p15, 0, %0, c1, c0, 0":"=r" (i)); - i &= ~(1 << 1); + i &= ~(1 << 1); - /* write back to control register */ - asm volatile ("mcr p15, 0, %0, c1, c0, 0": :"r" (i)); + /* write back to control register */ + asm volatile ("mcr p15, 0, %0, c1, c0, 0": :"r" (i)); } void mmu_clean_invalidated_cache_index(int index) { - asm volatile ("mcr p15, 0, %0, c7, c14, 2": :"r" (index)); + asm volatile ("mcr p15, 0, %0, c7, c14, 2": :"r" (index)); } void mmu_clean_dcache(rt_uint32_t buffer, rt_uint32_t size) { - unsigned int ptr; + unsigned int ptr; - ptr = buffer & ~0x1f; + ptr = buffer & ~0x1f; - while (ptr < buffer + size) - { - asm volatile ("mcr p15, 0, %0, c7, c10, 1": :"r" (ptr)); - ptr += 32; - } + while (ptr < buffer + size) + { + asm volatile ("mcr p15, 0, %0, c7, c10, 1": :"r" (ptr)); + ptr += 32; + } } void mmu_invalidate_dcache(rt_uint32_t buffer, rt_uint32_t size) { - unsigned int ptr; + unsigned int ptr; - ptr = buffer & ~0x1f; + ptr = buffer & ~0x1f; - while (ptr < buffer + size) - { - asm volatile ("mcr p15, 0, %0, c7, c6, 1": :"r" (ptr)); - ptr += 32; - } + while (ptr < buffer + size) + { + asm volatile ("mcr p15, 0, %0, c7, c6, 1": :"r" (ptr)); + ptr += 32; + } } void mmu_invalidate_tlb() { - asm volatile ("mcr p15, 0, %0, c8, c7, 0": :"r" (0)); + asm volatile ("mcr p15, 0, %0, c8, c7, 0": :"r" (0)); } void mmu_invalidate_icache() { - asm volatile ("mcr p15, 0, %0, c7, c5, 0": :"r" (0)); + asm volatile ("mcr p15, 0, %0, c7, c5, 0": :"r" (0)); } /* level1 page table */ @@ -150,8 +150,8 @@ void mmu_setmtt(rt_uint32_t vaddrStart, rt_uint32_t vaddrEnd, rt_uint32_t paddrS nSec=(vaddrEnd>>20)-(vaddrStart>>20); for(i=0;i<=nSec;i++) { - *pTT = attr |(((paddrStart>>20)+i)<<20); - pTT++; + *pTT = attr |(((paddrStart>>20)+i)<<20); + pTT++; } } @@ -161,21 +161,21 @@ RT_WEAK void mmu_setmtts(void) mmu_setmtt(0x00000000, 0xFFFFFFFF, 0x00000000, RW_NCNB); /* None cached for 4G memory */ mmu_setmtt(0x80200000, 0x80800000 - 1, 0x80200000, RW_CB); /* 126M cached DDR memory */ mmu_setmtt(0x80000000, 0x80200000 - 1, 0x80000000, RW_NCNB); /* 2M none-cached DDR memory */ - mmu_setmtt(0x402F0000, 0x40300000 - 1, 0x402F0000, RW_CB); /* 63K OnChip memory */ + mmu_setmtt(0x402F0000, 0x40300000 - 1, 0x402F0000, RW_CB); /* 63K OnChip memory */ } void rt_hw_mmu_init(void) { - /* disable I/D cache */ - mmu_disable_dcache(); - mmu_disable_icache(); - mmu_disable(); - mmu_invalidate_tlb(); + /* disable I/D cache */ + mmu_disable_dcache(); + mmu_disable_icache(); + mmu_disable(); + mmu_invalidate_tlb(); mmu_setmtts(); - /* set MMU table address */ - mmu_setttbase((rt_uint32_t)_page_table); + /* set MMU table address */ + mmu_setttbase((rt_uint32_t)_page_table); /* enables MMU */ mmu_enable(); |