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| author | Ben Dooks <ben.dooks@codethink.co.uk> | 2016-06-21 12:20:24 +0200 |
|---|---|---|
| committer | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2016-06-21 13:25:58 +0200 |
| commit | 458ad21df1c38d229aaa4c494199168d742302ab (patch) | |
| tree | 738f776820ef323c479a9741cbb70a16dee07b2a /arch/arm/mach-exynos | |
| parent | ARM: SAMSUNG: Fixup endian issues in CPU detection (diff) | |
| download | linux-458ad21df1c38d229aaa4c494199168d742302ab.tar.xz linux-458ad21df1c38d229aaa4c494199168d742302ab.zip | |
ARM: EXYNOS: Fixups for big-endian operation
If the kernel is built big endian, then using the __raw read and write IO
accessors is not going to work as they end up writing big-endian data to
little-endian IO registers. Fix this by using the readl and writel relaxed
versions which ensure little endian IO.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Diffstat (limited to 'arch/arm/mach-exynos')
| -rw-r--r-- | arch/arm/mach-exynos/firmware.c | 18 | ||||
| -rw-r--r-- | arch/arm/mach-exynos/headsmp.S | 3 | ||||
| -rw-r--r-- | arch/arm/mach-exynos/platsmp.c | 4 |
3 files changed, 14 insertions, 11 deletions
diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c index 1bfd1b0bd9dc..fd6da5419b51 100644 --- a/arch/arm/mach-exynos/firmware.c +++ b/arch/arm/mach-exynos/firmware.c @@ -41,9 +41,9 @@ static int exynos_do_idle(unsigned long mode) case FW_DO_IDLE_AFTR: if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) exynos_save_cp15(); - __raw_writel(virt_to_phys(exynos_cpu_resume_ns), - sysram_ns_base_addr + 0x24); - __raw_writel(EXYNOS_AFTR_MAGIC, sysram_ns_base_addr + 0x20); + writel_relaxed(virt_to_phys(exynos_cpu_resume_ns), + sysram_ns_base_addr + 0x24); + writel_relaxed(EXYNOS_AFTR_MAGIC, sysram_ns_base_addr + 0x20); if (soc_is_exynos3250()) { flush_cache_all(); exynos_smc(SMC_CMD_SAVE, OP_TYPE_CORE, @@ -97,7 +97,7 @@ static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr) if (soc_is_exynos4412()) boot_reg += 4 * cpu; - __raw_writel(boot_addr, boot_reg); + writel_relaxed(boot_addr, boot_reg); return 0; } @@ -113,7 +113,7 @@ static int exynos_get_cpu_boot_addr(int cpu, unsigned long *boot_addr) if (soc_is_exynos4412()) boot_reg += 4 * cpu; - *boot_addr = __raw_readl(boot_reg); + *boot_addr = readl_relaxed(boot_reg); return 0; } @@ -234,20 +234,20 @@ void exynos_set_boot_flag(unsigned int cpu, unsigned int mode) { unsigned int tmp; - tmp = __raw_readl(REG_CPU_STATE_ADDR + cpu * 4); + tmp = readl_relaxed(REG_CPU_STATE_ADDR + cpu * 4); if (mode & BOOT_MODE_MASK) tmp &= ~BOOT_MODE_MASK; tmp |= mode; - __raw_writel(tmp, REG_CPU_STATE_ADDR + cpu * 4); + writel_relaxed(tmp, REG_CPU_STATE_ADDR + cpu * 4); } void exynos_clear_boot_flag(unsigned int cpu, unsigned int mode) { unsigned int tmp; - tmp = __raw_readl(REG_CPU_STATE_ADDR + cpu * 4); + tmp = readl_relaxed(REG_CPU_STATE_ADDR + cpu * 4); tmp &= ~mode; - __raw_writel(tmp, REG_CPU_STATE_ADDR + cpu * 4); + writel_relaxed(tmp, REG_CPU_STATE_ADDR + cpu * 4); } diff --git a/arch/arm/mach-exynos/headsmp.S b/arch/arm/mach-exynos/headsmp.S index b54f9701e421..d3d24ab351ae 100644 --- a/arch/arm/mach-exynos/headsmp.S +++ b/arch/arm/mach-exynos/headsmp.S @@ -12,12 +12,15 @@ #include <linux/linkage.h> #include <linux/init.h> +#include <asm/assembler.h> + /* * exynos4 specific entry point for secondary CPUs. This provides * a "holding pen" into which all secondary cores are held until we're * ready for them to initialise. */ ENTRY(exynos4_secondary_startup) +ARM_BE8(setend be) mrc p15, 0, r0, c0, c0, 5 and r0, r0, #15 adr r4, 1f diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c index 85c3be63d644..98ffe1e62ad5 100644 --- a/arch/arm/mach-exynos/platsmp.c +++ b/arch/arm/mach-exynos/platsmp.c @@ -264,7 +264,7 @@ int exynos_set_boot_addr(u32 core_id, unsigned long boot_addr) ret = PTR_ERR(boot_reg); goto fail; } - __raw_writel(boot_addr, boot_reg); + writel_relaxed(boot_addr, boot_reg); ret = 0; } fail: @@ -289,7 +289,7 @@ int exynos_get_boot_addr(u32 core_id, unsigned long *boot_addr) ret = PTR_ERR(boot_reg); goto fail; } - *boot_addr = __raw_readl(boot_reg); + *boot_addr = readl_relaxed(boot_reg); ret = 0; } fail: |