diff options
| author | Yunhao Tian <[email protected]> | 2021-12-08 13:39:27 +0800 |
|---|---|---|
| committer | Yunhao Tian <[email protected]> | 2021-12-08 13:39:27 +0800 |
| commit | 527036b1f5a3f0aa3994f62e3ab18fa990a40cf8 (patch) | |
| tree | d6f466bc9a93f81a0a6bce40bebf23a39aa9c858 | |
| parent | 43621ab9edda8765a555585e11fee2a9867c4140 (diff) | |
Initialize MMU if we are executing from DDR
| -rw-r--r-- | hw/mcu/allwinner/f1c100s/machine/start.S | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/hw/mcu/allwinner/f1c100s/machine/start.S b/hw/mcu/allwinner/f1c100s/machine/start.S index 1fd7cb1f9..befb22148 100644 --- a/hw/mcu/allwinner/f1c100s/machine/start.S +++ b/hw/mcu/allwinner/f1c100s/machine/start.S @@ -111,37 +111,38 @@ reset: ldmia r0!, {r2-r8, r10} stmia r1!, {r2-r8, r10} - /* Initial system clock, ddr add uart */ + /* Initial system clock, ddr and uart */ bl sys_clock_init - bl sys_dram_init bl sys_uart_init - /* Boot speed up, leave slower sram */ + /* Check if we are already running from dram */ adr r0, _start ldr r1, =_start cmp r0, r1 - beq _speedup + beq _init_mmu + + /* Init dram if not running from dram */ + bl sys_dram_init + + /* Copy bootloader to faster dram (sram is slower) */ ldr r0, =0x81f80000 adr r1, _start mov r2, #0x4000 bl memcpy - ldr r0, =_speedup + ldr r0, =_copy_self ldr r1, =_start sub r0, r0, r1 ldr r1, =0x81f80000 add r0, r0, r1 mov pc, r0 -_speedup: - nop - +_init_mmu: + bl sys_mmu_init + b 1f +_copy_self: /* Copyself to link address */ - adr r0, _start - ldr r1, =_start - cmp r0, r1 - beq 1f bl sys_copyself -1: nop +1: nop /* Initialize stacks */ mrs r0, cpsr bic r0, r0, #0x1f |