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Finish writing warmboot _crt0_

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This commit is contained in:
TuxSH
2018-03-03 16:58:23 +01:00
parent 48e8d9c7de
commit be6b67669f
4 changed files with 85 additions and 41 deletions
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46
exosphere/src/coldboot_init.c
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@@ -122,39 +122,6 @@ uintptr_t get_coldboot_crt0_stack_address(void) {
return TZRAM_GET_SEGMENT_PA(TZRAM_SEGMENT_ID_CORE3_STACK) + 0x800;
}
void coldboot_init_dma_controllers(void) {
/* SYSCTR0_CNTCR_0 = ENABLE | HALT_ON_DEBUG (write-once init) */
(*((volatile uint32_t *)(0x700F0000))) = 3;
/* Set some unknown registers in HOST1X. */
(*((volatile uint32_t *)(0x500038F8))) &= 0xFFFFFFFE;
(*((volatile uint32_t *)(0x50003300))) = 0;
/* AHB_MASTER_SWID_0 */
(*((volatile uint32_t *)(0x6000C018))) = 0;
/* AHB_MASTER_SWID_1 - Makes USB1/USB2 use SWID[1] */
(*((volatile uint32_t *)(0x6000C038))) = 0x40040;
/* APBDMA_CHANNEL_SWID_0 = ~0 (SWID = 1 for all APB-DMA channels) */
(*((volatile uint32_t *)(0x6002003C))) = 0xFFFFFFFF;
/* APBDMA_CHANNEL_SWID1_0 = 0 (See above) */
(*((volatile uint32_t *)(0x60020054))) = 0;
/* APBDMA_SECURITY_REG_0 = 0 (All APB-DMA channels non-secure) */
(*((volatile uint32_t *)(0x60020038))) = 0;
/* MSELECT_CONFIG_0 |= WRAP_TO_INCR_SLAVE0(APC) | WRAP_TO_INCR_SLAVE1(PCIe) | WRAP_TO_INCR_SLAVE2(GPU) */
(*((volatile uint32_t *)(0x50060000))) |= 0x38000000;
/* AHB_ARBITRATION_PRIORITY_CTRL_0 - Select high prio group with prio 7 */
(*((volatile uint32_t *)(0x6000C008))) = 0xE0000001;
/* AHB_GIZMO_TZRAM_0 |= DONT_SPLIT_AHB_WR */
(*((volatile uint32_t *)(0x6000C054))) = 0x80;
}
void coldboot_init(coldboot_crt0_reloc_list_t *reloc_list, boot_func_list_t *func_list, boot_func_list_t *func_list_warmboot) {
/* Custom approach */
reloc_list->reloc_base = (uintptr_t)__start_cold;
@@ -168,8 +135,16 @@ void coldboot_init(coldboot_crt0_reloc_list_t *reloc_list, boot_func_list_t *fun
/* At this point, we can (and will) access functions located in .warm_crt0 */
translate_warmboot_func_list(reloc_list, func_list);
/* TODO: 4.x does slightly different init. How should we handle this? We can't detect master key revision yet. */
coldboot_init_dma_controllers();
/*
From https://events.static.linuxfound.org/sites/events/files/slides/slides_17.pdf :
Caches may write back dirty lines at any time:
- To make space for new allocations
- 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();
func_list->funcs.init_dma_controllers();
configure_ttbls();
func_list->funcs.set_memory_registers_enable_mmu();
@@ -179,7 +154,6 @@ void coldboot_init(coldboot_crt0_reloc_list_t *reloc_list, boot_func_list_t *fun
do_relocation(reloc_list, reloc_list->nb_relocs_pre_mmu_init + i);
}
func_list->funcs.flush_dcache_all();
func_list->funcs.invalidate_icache_all();
/* At this point we can access all the mapped segments (all other functions, data...) normally */