diff options
| author | Furquan Shaikh <furquan@google.com> | 2014-09-11 16:06:01 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-03-28 07:04:48 +0100 |
| commit | 441df53f838218484cd8b95ca7c62eefa35ed2c3 (patch) | |
| tree | affb30049bbfdf56a9c2ef5e7d1997f7e3e86acb | |
| parent | 0f0b690afc8752cefa02e20073cb1fc5d1061244 (diff) | |
arm64: Switch to EL2 for libpayload jump
CQ-DEPEND=CL:216826,CL:218300
BUG=chrome-os-partner:31634
BRANCH=None
TEST=Compiles successfully and we are able to start execution of libpayload in
EL2 and reach kernel login prompt
Change-Id: I233f9867470a4723f320dc0dcaa670a56dcf0f5d
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 169948a2afeeb7848daeb37600963bd503527f1a
Original-Change-Id: I336d73085f08ca03e533555a10b88f20d74b4347
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/217826
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/9074
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
| -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); } |