diff options
| author | Furquan Shaikh <furquan@google.com> | 2014-08-27 16:00:24 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-03-21 13:35:47 +0100 |
| commit | 678dee08f6e1c265c9663e6f5645d4a7ea2d983d (patch) | |
| tree | c799adefe82637e8c1fe635389944254ccbfa373 | |
| parent | 635b45d60878887fba7425f61870cf2a9a6f3102 (diff) | |
libpayload arm64: Remove tight-coupling with any particular EL
Allow more flexibility by reading and writing to system registers at current
EL. Instead of specifying what _ELx register to write to, code can specify
_current.
BUG=chrome-os-partner:31634
BRANCH=None
TEST=Compiles and boots to kernel on ryu
Change-Id: Id38b675bfe67ca1e25f8c268192114e3f0bee800
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 6d4d07e26fc964dc3aaebfe03db59596d90093e9
Original-Change-Id: Ic1d9e18e6fc016a04f17621a148e62d6cbd04ce7
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/214577
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/8785
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
| -rw-r--r-- | payloads/libpayload/arch/arm64/cache.c | 10 | ||||
| -rw-r--r-- | payloads/libpayload/arch/arm64/exception_asm.S | 15 |
2 files changed, 13 insertions, 12 deletions
diff --git a/payloads/libpayload/arch/arm64/cache.c b/payloads/libpayload/arch/arm64/cache.c index e89d49e4c8..1a9e7a60f9 100644 --- a/payloads/libpayload/arch/arm64/cache.c +++ b/payloads/libpayload/arch/arm64/cache.c @@ -39,7 +39,7 @@ void tlb_invalidate_all(void) { /* TLBIALL includes dTLB and iTLB on systems that have them. */ - tlbiall_el3(); + tlbiall_current(); dsb(); isb(); } @@ -127,18 +127,18 @@ void dcache_mmu_disable(void) uint32_t sctlr; dcache_clean_invalidate_all(); - sctlr = raw_read_sctlr_el3(); + sctlr = raw_read_sctlr_current(); sctlr &= ~(SCTLR_C | SCTLR_M); - raw_write_sctlr_el3(sctlr); + raw_write_sctlr_current(sctlr); } void dcache_mmu_enable(void) { uint32_t sctlr; - sctlr = raw_read_sctlr_el3(); + sctlr = raw_read_sctlr_current(); sctlr |= SCTLR_C | SCTLR_M; - raw_write_sctlr_el3(sctlr); + raw_write_sctlr_current(sctlr); } void cache_sync_instructions(void) diff --git a/payloads/libpayload/arch/arm64/exception_asm.S b/payloads/libpayload/arch/arm64/exception_asm.S index 8e69ddad86..c9e694ac5f 100644 --- a/payloads/libpayload/arch/arm64/exception_asm.S +++ b/payloads/libpayload/arch/arm64/exception_asm.S @@ -27,6 +27,9 @@ * SUCH DAMAGE. */ +#define __ASSEMBLY__ +#include <arch/lib_helpers.h> + .text /* Macro for exception entry @@ -89,10 +92,10 @@ exception_prologue: stp x0, x1, [sp, #-16]! /* Save the exception reason on stack */ - mrs x1, esr_el3 + read_current x1, esr /* Save the return address on stack */ - mrs x0, elr_el3 + read_current x0, elr stp x0, x1, [sp, #-16]! ret @@ -106,8 +109,8 @@ exception_handler: /* Pop return address saved on stack */ ldp x0, x1, [sp], #16 - msr elr_el3, x0 - msr esr_el3, x1 + write_current elr, x0, x2 + write_current esr, x1, x2 /* Pop exception reason saved on stack, followed by regs x0-x30 */ ldp x0, x1, [sp], #16 ldp x2, x3, [sp], #16 @@ -129,7 +132,5 @@ exception_handler: .global set_vbar set_vbar: - /* Initialize the exception table address in vbar for EL3 */ - /* FIXME: Do we need to initialize for other levels too? EL1/EL2 */ - msr vbar_el3, x0 + write_current vbar, x0, x1 ret |