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Exosphere: Copy initial data image to DRAM for coldboot init.
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parent
1a9f095463
commit
ea905725c4
2 changed files with 26 additions and 7 deletions
exosphere/src
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@ -122,7 +122,7 @@ uintptr_t get_coldboot_crt0_stack_address(void) {
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void coldboot_init(coldboot_crt0_reloc_list_t *reloc_list, uintptr_t start_cold) {
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//MAILBOX_NX_SECMON_BOOT_TIME = TIMERUS_CNTR_1US_0;
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//MAKE_REG32(0x7000E400ULL) = 0x10;
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MAKE_REG32(0x7000E400ULL) = 0x10;
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/* Custom approach */
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reloc_list->reloc_base = start_cold;
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@ -93,9 +93,10 @@ __start_cold:
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stp x3, x4, [x0], #0x10
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cmp x0, x2
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blo 1b
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adr x20, __start_cold
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adr x19, g_coldboot_crt0_relocation_list
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adr x19, __start_cold
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adr x20, g_coldboot_crt0_relocation_list
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sub x20, x20, x19
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ldr x16, =_post_cold_crt0_reloc
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br x16
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@ -105,10 +106,28 @@ _post_cold_crt0_reloc:
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bl get_coldboot_crt0_stack_address
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mov sp, x0
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mov fp, #0
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/* Relocate Exosphere image to free DRAM, clearing the image in IRAM. */
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ldr x0, =0x80010000
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add x20, x20, x0
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ldr x2, =__loaded_end_lma__
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ldr x3, =0x40020000
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sub x21, x2, x3
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mov x1, x19
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mov x2, x21
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add x2, x2, x0
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2:
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ldp x3, x4, [x1]
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stp x3, x4, [x0], #0x10
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stp xzr, xzr, [x1], #0x10
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cmp x0, x2
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blo 2b
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/* X1 is already set to __start_cold (original load location) from above. */
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mov x0, x19
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/* X0 = TZ-in-DRAM, X1 = relocation-list-in-DRAM. */
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ldr x0, =0x80010000
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mov x1, x20
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/* Set size in coldboot relocation list. */
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str x21, [x1, #0x8]
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bl coldboot_init
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ldr x16, =__jump_to_main_cold
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@ -240,7 +259,7 @@ __jump_to_lower_el:
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.align 3
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.global g_coldboot_crt0_relocation_list
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g_coldboot_crt0_relocation_list:
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.quad 0, __loaded_end_lma__ /* __start_cold, to be set & loaded size */
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.quad 0, 0 /* __start_cold, to be set & loaded size */
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.quad 1, 5 /* number of sections to relocate/clear before & after mmu init */
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/* Relocations */
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.quad __warmboot_crt0_start__, __warmboot_crt0_end__, __warmboot_crt0_lma__
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