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| author | Andrew Thoelke <andrew.thoelke@arm.com> | 2014-04-28 12:32:02 +0100 |
|---|---|---|
| committer | Andrew Thoelke <andrew.thoelke@arm.com> | 2014-05-07 11:29:50 +0100 |
| commit | 7935d0a59d439c993b79814ab414d37e4a90d9a6 (patch) | |
| tree | b441893641316f785bf782b24ac8877252eb8afb /plat/fvp/aarch64/bl1_plat_helpers.S | |
| parent | 2f5dcfef1db42f3b073ae657f8a94925abecd768 (diff) | |
| download | arm-trusted-firmware-7935d0a59d439c993b79814ab414d37e4a90d9a6.tar.gz | |
Access system registers directly in assembler
Instead of using the system register helper functions to read
or write system registers, assembler coded functions should
use MRS/MSR instructions. This results in faster and more
compact code.
This change replaces all usage of the helper functions with
direct register accesses.
Change-Id: I791d5f11f257010bb3e6a72c6c5ab8779f1982b3
Diffstat (limited to 'plat/fvp/aarch64/bl1_plat_helpers.S')
| -rw-r--r-- | plat/fvp/aarch64/bl1_plat_helpers.S | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/plat/fvp/aarch64/bl1_plat_helpers.S b/plat/fvp/aarch64/bl1_plat_helpers.S index 92075ea..b4d4458 100644 --- a/plat/fvp/aarch64/bl1_plat_helpers.S +++ b/plat/fvp/aarch64/bl1_plat_helpers.S @@ -67,7 +67,7 @@ func plat_secondary_cold_boot_setup * loader zeroes out the zi section. * --------------------------------------------- */ - bl read_mpidr + mrs x0, mpidr_el1 ldr x1, =PWRC_BASE str w0, [x1, #PPOFFR_OFF] @@ -173,8 +173,6 @@ func platform_mem_init func platform_cold_boot_init mov x20, x0 bl platform_mem_init - bl read_mpidr - mov x19, x0 /* --------------------------------------------- * Give ourselves a small coherent stack to @@ -182,6 +180,7 @@ func platform_cold_boot_init * CCI in assembler * --------------------------------------------- */ + mrs x0, mpidr_el1 bl platform_set_coherent_stack /* --------------------------------------------- @@ -200,7 +199,7 @@ func platform_cold_boot_init * -IS-WBWA memory * --------------------------------------------- */ - mov x0, x19 + mrs x0, mpidr_el1 bl platform_set_stack /* --------------------------------------------- |