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| author | Joseph Lo <josephl@nvidia.com> | 2013-05-20 12:39:25 +0200 |
|---|---|---|
| committer | Stephen Warren <swarren@nvidia.com> | 2013-05-22 23:19:22 +0200 |
| commit | f6d06f33664756cfa8bce3494e586be32b213bdd (patch) | |
| tree | daeb1a5839ece049ef3159cf07c5a2b60647a9a9 /arch/arm/mach-tegra/sleep.h | |
| parent | ARM: tegra: add an assembly marco to check Tegra SoC ID (diff) | |
| download | linux-f6d06f33664756cfa8bce3494e586be32b213bdd.tar.xz linux-f6d06f33664756cfa8bce3494e586be32b213bdd.zip | |
ARM: tegra: skip SCU and PL310 code when CPU is not Cortex-A9
For supporting single image on all Tegra series, we need to skip some HW
support code for Cortex-A9 only.
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/sleep.h')
| -rw-r--r-- | arch/arm/mach-tegra/sleep.h | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/arch/arm/mach-tegra/sleep.h b/arch/arm/mach-tegra/sleep.h index f9f2164a2fc7..2269c0d6fa67 100644 --- a/arch/arm/mach-tegra/sleep.h +++ b/arch/arm/mach-tegra/sleep.h @@ -70,19 +70,31 @@ movt \reg, #:upper16:\val .endm +/* Marco to check CPU part num */ +.macro check_cpu_part_num part_num, tmp1, tmp2 + mrc p15, 0, \tmp1, c0, c0, 0 + ubfx \tmp1, \tmp1, #4, #12 + mov32 \tmp2, \part_num + cmp \tmp1, \tmp2 +.endm + /* Macro to exit SMP coherency. */ .macro exit_smp, tmp1, tmp2 mrc p15, 0, \tmp1, c1, c0, 1 @ ACTLR bic \tmp1, \tmp1, #(1<<6) | (1<<0) @ clear ACTLR.SMP | ACTLR.FW mcr p15, 0, \tmp1, c1, c0, 1 @ ACTLR isb - cpu_id \tmp1 - mov \tmp1, \tmp1, lsl #2 - mov \tmp2, #0xf - mov \tmp2, \tmp2, lsl \tmp1 - mov32 \tmp1, TEGRA_ARM_PERIF_VIRT + 0xC - str \tmp2, [\tmp1] @ invalidate SCU tags for CPU +#ifdef CONFIG_HAVE_ARM_SCU + check_cpu_part_num 0xc09, \tmp1, \tmp2 + mrceq p15, 0, \tmp1, c0, c0, 5 + andeq \tmp1, \tmp1, #0xF + moveq \tmp1, \tmp1, lsl #2 + moveq \tmp2, #0xf + moveq \tmp2, \tmp2, lsl \tmp1 + ldreq \tmp1, =(TEGRA_ARM_PERIF_VIRT + 0xC) + streq \tmp2, [\tmp1] @ invalidate SCU tags for CPU dsb +#endif .endm /* Macro to check Tegra revision */ |