diff options
| -rw-r--r-- | src/arch/arm64/boot.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/src/arch/arm64/boot.c b/src/arch/arm64/boot.c index 5217a9f3b0..91980fbf19 100644 --- a/src/arch/arm64/boot.c +++ b/src/arch/arm64/boot.c @@ -18,17 +18,36 @@ */ #include <arch/cache.h> +#include <arch/lib_helpers.h> #include <arch/stages.h> +#include <arch/transition.h> #include <cbmem.h> #include <console/console.h> #include <program_loading.h> +#include <string.h> void arch_payload_run(const struct payload *payload) { void (*doit)(void *) = payload->entry; void *cb_tables = cbmem_find(CBMEM_ID_CBTABLE); + uint8_t current_el = get_current_el(); printk(BIOS_SPEW, "entry = %p\n", payload->entry); + + /* If current EL is not EL3, jump to payload at same EL. */ + if (current_el != EL3) { + cache_sync_instructions(); + /* Point of no-return */ + doit(cb_tables); + } + + /* If current EL is EL3, we transition to payload in EL2. */ + struct exc_state exc_state; + + memset(&exc_state, 0, sizeof(exc_state)); + + exc_state.elx.spsr = get_eret_el(EL2, SPSR_USE_L); + cache_sync_instructions(); - doit(cb_tables); + transition_with_entry(payload->entry, cb_tables, &exc_state); } |