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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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14
exosphere/src/cpu_context.c
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@ -23,9 +23,6 @@
/* start.s */
void __attribute__((noreturn)) __jump_to_lower_el(uint64_t arg, uintptr_t ep, uint32_t spsr);
/* See notes in start.s */
critical_section_t g_boot_critical_section = {{{.ticket_number = 1}}};
static saved_cpu_context_t g_cpu_contexts[NUM_CPU_CORES] = {0};
void use_core_entrypoint_and_argument(uint32_t core, uintptr_t *entrypoint_addr, uint64_t *argument) {
@ -47,15 +44,22 @@ void set_core_entrypoint_and_argument(uint32_t core, uintptr_t entrypoint_addr,
g_cpu_contexts[core].argument = argument;
}
static __attribute__((target("cmodel=large"), noinline))
critical_section_t *get_boot_critical_section(void) {
return &g_boot_critical_section;
}
void __attribute__((noreturn)) core_jump_to_lower_el(void) {
uintptr_t ep;
uint64_t arg;
unsigned int core_id = get_core_id();
uint32_t spsr = get_spsr();
critical_section_t *critsec = get_boot_critical_section();
use_core_entrypoint_and_argument(core_id, &ep, &arg);
critical_section_leave(&g_boot_critical_section);
flush_dcache_range(&g_boot_critical_section, (uint8_t *)&g_boot_critical_section + sizeof(g_boot_critical_section)); /* already does a dsb sy */
critical_section_leave(critsec);
flush_dcache_range(critsec, (uint8_t *)critsec + sizeof(critical_section_t));
/* already does a dsb sy */
__sev();
/* Nintendo hardcodes EL1, but we can boot fine using other EL1/EL2 modes as well */