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Code Issues Releases Activity

Clear pk2ldr in coldboot_main

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This commit is contained in:
TuxSH 2018-02-25 03:54:28 +01:00
parent a00e68e94a
commit b0079e404d
2 changed files with 15 additions and 4 deletions
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13
exosphere/coldboot_main.c
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@ -1,3 +1,4 @@
#include <string.h>
#include "utils.h"
#include "mmu.h"
#include "memory_map.h"
@ -6,6 +7,8 @@ extern void (*__fini_array_start[])(void);
extern void (*__fini_array_end[])(void);
extern void _fini(void);
extern uint8_t __pk2ldr_start__[], __pk2ldr_end__[];
extern void __jump_to_lower_el(uint64_t arg, uintptr_t ep, unsigned int el);
void coldboot_main(void);
@ -18,5 +21,13 @@ static void __libc_fini_array(void) __attribute__((used)) {
}
void coldboot_main(void) {
/* TODO */
uintptr_t *mmu_l3_table = (uintptr_t *)tzram_get_segment_address(TZRAM_SEGMENT_ID_L3_TRANSLATION_TABLE);
void *pk2ldr = (void *)tzram_get_segment_address(TZRAM_SEGMENT_ID_PK2LDR);
/* Clear and unmap pk2ldr (which is reused as exception entry stacks) */
memset(pk2ldr, 0, __pk2ldr_end__ - __pk2ldr_start__);
mmu_unmap_range(mmu_l3_table, pk2ldr, __pk2ldr_end__ - __pk2ldr_start__);
tlb_invalidate_all_inner_shareable();
/* TODO: stuff & jump to lower EL */
}

6
exosphere/mmu.h
View file

@ -150,21 +150,21 @@ static inline void mmu_unmap(unsigned int level, uintptr_t *tbl, uintptr_t base_
}
static inline void mmu_map_block_range(unsigned int level, uintptr_t *tbl, uintptr_t base_addr, uintptr_t phys_addr, size_t size, uint64_t attrs) {
size = (size >> MMU_Lx_SHIFT(level)) << MMU_Lx_SHIFT(level);
size = ((size + (BITL(MMU_Lx_SHIFT(level)) - 1)) >> MMU_Lx_SHIFT(level)) << MMU_Lx_SHIFT(level);
for(size_t offset = 0; offset < size; offset += MMU_Lx_SHIFT(level)) {
mmu_map_block(level, tbl, base_addr + offset, phys_addr + offset, attrs);
}
}
static inline void mmu_map_page_range(uintptr_t *tbl, uintptr_t base_addr, uintptr_t phys_addr, size_t size, uint64_t attrs) {
size = (size >> MMU_Lx_SHIFT(3)) << MMU_Lx_SHIFT(3);
size = ((size + (BITL(MMU_Lx_SHIFT(3)) - 1)) >> MMU_Lx_SHIFT(3)) << MMU_Lx_SHIFT(3);
for(size_t offset = 0; offset < size; offset += MMU_Lx_SHIFT(3)) {
mmu_map_page(tbl, base_addr + offset, phys_addr + offset, attrs);
}
}
static inline void mmu_unmap_range(unsigned int level, uintptr_t *tbl, uintptr_t base_addr, size_t size) {
size = (size >> MMU_Lx_SHIFT(level)) << MMU_Lx_SHIFT(level);
size = ((size + (BITL(MMU_Lx_SHIFT(level)) - 1)) >> MMU_Lx_SHIFT(level)) << MMU_Lx_SHIFT(level);
for(size_t offset = 0; offset < size; offset += MMU_Lx_SHIFT(level)) {
mmu_unmap(level, tbl, base_addr + offset);
}