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Code Issues Releases Activity

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
View file

@ -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 */

3
exosphere/src/start.s
View file

@ -242,8 +242,9 @@ g_coldboot_crt0_relocation_list:
.align 3
.global g_coldboot_crt0_main_func_list
g_coldboot_crt0_main_func_list:
.quad 3 /* Number of functions */
.quad 4 /* Number of functions */
/* Functions */
.quad init_dma_controllers
.quad set_memory_registers_enable_mmu
.quad flush_dcache_all
.quad invalidate_icache_all

3
exosphere/src/utils.h
View file

@ -24,11 +24,12 @@ typedef struct {
size_t nb_funcs;
union {
struct {
void (*init_dma_controllers)(void);
void (*set_memory_registers_enable_mmu)(void);
void (*flush_dcache_all)(void);
void (*invalidate_icache_all)(void);
} funcs;
uintptr_t addrs[3];
uintptr_t addrs[4];
};
} boot_func_list_t;

74
exosphere/src/warmboot_init.c
View file

@ -1,9 +1,12 @@
#include "utils.h"
#include "memory_map.h"
#include "mc.h"
#include "arm.h"
#include "synchronization.h"
#undef MC_BASE
#define MC_BASE (MMIO_GET_DEVICE_PA(MMIO_DEVID_MC))
/* start.s */
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);
@ -27,6 +30,41 @@ void warmboot_crt0_critical_section_enter(volatile critical_section_t *critical_
critical_section_enter(critical_section);
}
void init_dma_controllers(void) {
/* TODO: 4.x does slightly different init. How should we handle this? We can't detect master key revision yet. */
/* 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 set_memory_registers_enable_mmu(void) {
static const uintptr_t vbar = TZRAM_GET_SEGMENT_ADDRESS(TZRAM_SEGEMENT_ID_SECMON_EVT) + 0x800;
static const uintptr_t ttbr0 = TZRAM_GET_SEGMENT_PA(TZRAM_SEGEMENT_ID_SECMON_EVT) + 0x800 - 64;
@ -80,6 +118,36 @@ void set_memory_registers_enable_mmu(void) {
__set_memory_registers(ttbr0, vbar, cpuectlr, scr, tcr, cptr, mair, sctlr);
}
void warmboot_init(boot_func_list_t *func_list) {
(void)func_list;
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);
uintptr_t *mmu_l2_tbl = (uintptr_t *)TZRAM_GET_SEGMENT_PA(TZRAM_SEGMENT_ID_L2_TRANSLATION_TABLE);
uintptr_t *mmu_l3_tbl = (uintptr_t *)TZRAM_GET_SEGMENT_PA(TZRAM_SEGMENT_ID_L3_TRANSLATION_TABLE);
mmu_map_table(1, mmu_l1_tbl, 0x40000000, mmu_l2_tbl, 0);
mmu_map_table(2, mmu_l2_tbl, 0x7C000000, mmu_l3_tbl, 0);
identity_map_mapping(mmu_l1_tbl, mmu_l3_tbl, IDENTITY_GET_MAPPING_ADDRESS(IDENTITY_MAPPING_TZRAM),
IDENTITY_GET_MAPPING_SIZE(IDENTITY_MAPPING_TZRAM), IDENTITY_GET_MAPPING_ATTRIBS(IDENTITY_MAPPING_TZRAM),
IDENTITY_IS_MAPPING_BLOCK_RANGE(IDENTITY_MAPPING_TZRAM));
}
void warmboot_init(boot_func_list_t *func_list) {
/*
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();
if(MC_SECURITY_CFG0_0 != 0) {
init_dma_controllers();
}
identity_remap_tzram();
/* Nintendo pointlessly fully invalidate the TLB & invalidate the data cache on the modified ranges here */
set_memory_registers_enable_mmu();
}