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[exosphere] Rewrite crt0/init and ld script

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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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50
exosphere/src/start.s
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@@ -81,6 +81,24 @@ __start_cold:
However we'll initialize g_boot_critical_section so that it acts like core0 has entered it,
for it to be in .data and for safety.
*/
/* Relocate the crt0. Nintendo doesn't do it. */
ldr x0, =__cold_crt0_start__
adr x1, __start_cold
ldr x2, =__cold_crt0_end__
cmp x0, x1
beq _post_cold_crt0_reloc
1:
ldp x3, x4, [x0], #0x10
stp x3, x4, [x1], #0x10
cmp x0, x2
blo 1b
ldr x16, =_post_cold_crt0_reloc
br x16
_post_cold_crt0_reloc:
msr spsel, #0
bl get_coldboot_crt0_stack_address
mov sp, x0
@@ -88,9 +106,7 @@ __start_cold:
adr x0, g_coldboot_crt0_relocation_list
mov x19, x0
adr x1, g_coldboot_crt0_main_func_list
ldr x2, =g_warmboot_crt0_main_func_list
adr x3, __start_cold
adr x1, __start_cold
bl coldboot_init
ldr x16, =__jump_to_main_cold
@@ -112,17 +128,12 @@ __start_warm:
/* PA(__main_start__) = __warmboot_crt0_start__ + 0x800 (refer to the linker script) */
ldr x0, =g_boot_critical_section
ldr x1, =__main_start__
sub x0, x0, x1
ldr x1, =(__start_warm + 0x800)
add x0, x0, x1
bl warmboot_crt0_critical_section_enter
bl get_warmboot_crt0_stack_address
mov sp, x0
mov fp, #0
adr x0, g_warmboot_crt0_main_func_list
bl warmboot_init
ldr x16, =__jump_to_main_warm
br x16
@@ -238,20 +249,9 @@ g_coldboot_crt0_relocation_list:
.quad __main_bss_start__, __main_end__, 0
.quad __pk2ldr_bss_start__, __pk2ldr_end__, 0
.section .cold_crt0.data.g_coldboot_crt0_main_func_list, "aw", %progbits
.align 3
.global g_coldboot_crt0_main_func_list
g_coldboot_crt0_main_func_list:
.quad 4 /* Number of functions */
.quad 0 /* Target firmware, overwritten in coldboot_init. */
/* Functions */
.quad init_dma_controllers
.quad set_memory_registers_enable_mmu
.quad flush_dcache_all
.quad invalidate_icache_all
.section .warm_crt0.data.g_warmboot_crt0_main_func_list, "aw", %progbits
.align 3
.global g_warmboot_crt0_main_func_list
g_warmboot_crt0_main_func_list:
.space (6 * 8)
/* Critical section */
.section .warm_crt0.data.g_boot_critical_section, "aw", %progbits
.align 2
.global g_boot_critical_section
g_boot_critical_section:
.word 1 /* Core0 entered, by default. */