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[exosphere] Rewrite crt0/init and ld script

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This commit is contained in:
TuxSH
2018-05-11 14:07:37 +02:00
parent 02e01360fd
commit 05b8b42164
11 changed files with 160 additions and 177 deletions
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14
exosphere/src/warmboot_init.c
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@@ -12,6 +12,8 @@
void __set_memory_registers(uintptr_t ttbr0, uintptr_t vbar, uint64_t cpuectlr, uint32_t scr,
uint32_t tcr, uint32_t cptr, uint64_t mair, uint32_t sctlr);
unsigned int g_exosphere_target_firmware_for_init = 0;
uintptr_t get_warmboot_crt0_stack_address(void) {
return TZRAM_GET_SEGMENT_PA(TZRAM_SEGMENT_ID_CORE012_STACK) + 0x800;
}
@@ -140,6 +142,7 @@ void set_memory_registers_enable_mmu(void) {
__set_memory_registers(ttbr0, vbar, cpuectlr, scr, tcr, cptr, mair, sctlr);
}
#if 0 /* Since we decided not to identity-unmap TZRAM */
static void identity_remap_tzram(void) {
/* See also: configure_ttbls (in coldboot_init.c). */
uintptr_t *mmu_l1_tbl = (uintptr_t *)(TZRAM_GET_SEGMENT_PA(TZRAM_SEGEMENT_ID_SECMON_EVT) + 0x800 - 64);
@@ -153,8 +156,9 @@ static void identity_remap_tzram(void) {
IDENTITY_GET_MAPPING_SIZE(IDENTITY_MAPPING_TZRAM), IDENTITY_GET_MAPPING_ATTRIBS(IDENTITY_MAPPING_TZRAM),
IDENTITY_IS_MAPPING_BLOCK_RANGE(IDENTITY_MAPPING_TZRAM));
}
#endif
void warmboot_init(boot_func_list_t *func_list) {
void warmboot_init(void) {
/*
From https://events.static.linuxfound.org/sites/events/files/slides/slides_17.pdf :
Caches may write back dirty lines at any time:
@@ -162,15 +166,15 @@ void warmboot_init(boot_func_list_t *func_list) {
- Even if MMU is off
- Even if Cacheable accesses are disabled (caches are never 'off')
*/
func_list->funcs.flush_dcache_all();
func_list->funcs.invalidate_icache_all();
flush_dcache_all();
invalidate_icache_all();
/* On warmboot (not cpu_on) only */
if (MC_SECURITY_CFG3_0 == 0) {
init_dma_controllers(func_list->target_firmware);
init_dma_controllers(g_exosphere_target_firmware_for_init);
}
identity_remap_tzram();
/*identity_remap_tzram();*/
/* Nintendo pointlessly fully invalidate the TLB & invalidate the data cache on the modified ranges here */
set_memory_registers_enable_mmu();
}