diff options
| author | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2015-03-18 14:09:56 +0100 |
|---|---|---|
| committer | Kukjin Kim <kgene@kernel.org> | 2015-06-06 02:17:56 +0900 |
| commit | 1225ad72866b440574a22372b9edceb035632f2b (patch) | |
| tree | 603a16be4a7cefb476435b7b49d8c913f8e2718d /arch/arm/mach-exynos/platsmp.c | |
| parent | 955d4cf82fcbda67ff141eebc560a3dc5a77d7ed (diff) | |
ARM: EXYNOS: add exynos_get_boot_addr() helper
Add get_cpu_boot_addr() firmware operation and then
exynos_get_boot_addr() helper.
This is a preparation for adding coupled cpuidle support
for Exynos3250 SoC.
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
Diffstat (limited to 'arch/arm/mach-exynos/platsmp.c')
| -rw-r--r-- | arch/arm/mach-exynos/platsmp.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c index b7cfcdcc0984..449edd1121e4 100644 --- a/arch/arm/mach-exynos/platsmp.c +++ b/arch/arm/mach-exynos/platsmp.c @@ -272,6 +272,31 @@ fail: return ret; } +static int exynos_get_boot_addr(u32 core_id, unsigned long *boot_addr) +{ + int ret; + + /* + * Try to get boot address using firmware first + * and fall back to boot register if it fails. + */ + ret = call_firmware_op(get_cpu_boot_addr, core_id, boot_addr); + if (ret && ret != -ENOSYS) + goto fail; + if (ret == -ENOSYS) { + void __iomem *boot_reg = cpu_boot_reg(core_id); + + if (IS_ERR(boot_reg)) { + ret = PTR_ERR(boot_reg); + goto fail; + } + *boot_addr = __raw_readl(boot_reg); + ret = 0; + } +fail: + return ret; +} + static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle) { unsigned long timeout; |