The cpu booting of exynos5422 has been still broken since we discussed it in last year[1]. I found this resetting codes from odroid-xu3 kernel of hardkernel, it could help to boot 8 cores well. This patch need to have more test like STR and other SoC especially exynos5800 which is variant of exynos5422. If this patch is broken on exynos5800, I'll find another way to check exynos5422.
This patch is top of my previous exynos5422 cpu ordering patch[2] and need to enable CONFIG_EXYNOS5420_MCPM=y [ 0.047509] CPU0: update cpu_capacity 448 [ 0.047534] CPU0: thread -1, cpu 0, socket 1, mpidr 80000100 [ 0.047874] Setting up static identity map for 0x400082c0 - 0x40008318 [ 0.048340] ARM CCI driver probed [ 0.048597] Exynos MCPM support installed [ 0.065676] CPU1: update cpu_capacity 448 [ 0.065685] CPU1: thread -1, cpu 1, socket 1, mpidr 80000101 [ 0.070672] CPU2: update cpu_capacity 448 [ 0.070680] CPU2: thread -1, cpu 2, socket 1, mpidr 80000102 [ 0.075644] CPU3: update cpu_capacity 448 [ 0.075653] CPU3: thread -1, cpu 3, socket 1, mpidr 80000103 [ 0.080590] CPU4: update cpu_capacity 1535 [ 0.080600] CPU4: thread -1, cpu 0, socket 0, mpidr 80000000 [ 0.085591] CPU5: update cpu_capacity 1535 [ 0.085599] CPU5: thread -1, cpu 1, socket 0, mpidr 80000001 [ 0.090590] CPU6: update cpu_capacity 1535 [ 0.090598] CPU6: thread -1, cpu 2, socket 0, mpidr 80000002 [ 0.095585] CPU7: update cpu_capacity 1535 [ 0.095593] CPU7: thread -1, cpu 3, socket 0, mpidr 80000003 [ 0.095720] Brought up 8 CPUs [1]:http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/350632.html [2]:https://patchwork.kernel.org/patch/6782891/ Cc: Joonyoung Shim <[email protected]> Cc: Chanwoo Choi <[email protected]> Cc: Kevin Hilman <[email protected]> Cc: Heesub Shin <[email protected]> Cc: Mauro Ribeiro <[email protected]> Cc: Abhilash Kesavan <[email protected]> Cc: Przemyslaw Marczak <[email protected]> Cc: Marek Szyprowski <[email protected]> Cc: Krzysztof Kozlowski <[email protected]> Signed-off-by: Chanho Park <[email protected]> Signed-off-by: Chanho Park <[email protected]> --- arch/arm/mach-exynos/mcpm-exynos.c | 13 ++++++++++++- arch/arm/mach-exynos/regs-pmu.h | 6 ++++++ 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-exynos/mcpm-exynos.c b/arch/arm/mach-exynos/mcpm-exynos.c index 9bdf547..a076dde 100644 --- a/arch/arm/mach-exynos/mcpm-exynos.c +++ b/arch/arm/mach-exynos/mcpm-exynos.c @@ -70,7 +70,18 @@ static int exynos_cpu_powerup(unsigned int cpu, unsigned int cluster) cluster >= EXYNOS5420_NR_CLUSTERS) return -EINVAL; - exynos_cpu_power_up(cpunr); + if (!exynos_cpu_power_state(cpunr)) { + exynos_cpu_power_up(cpunr); + + if (soc_is_exynos5800() && cluster) { + while (!pmu_raw_readl(S5P_PMU_SPARE2)) + udelay(10); + + pmu_raw_writel(EXYNOS5420_KFC_CORE_RESET(cpu), + EXYNOS_SWRESET); + } + } + return 0; } diff --git a/arch/arm/mach-exynos/regs-pmu.h b/arch/arm/mach-exynos/regs-pmu.h index b761433..fba9068 100644 --- a/arch/arm/mach-exynos/regs-pmu.h +++ b/arch/arm/mach-exynos/regs-pmu.h @@ -513,6 +513,12 @@ static inline unsigned int exynos_pmu_cpunr(unsigned int mpidr) #define SPREAD_ENABLE 0xF #define SPREAD_USE_STANDWFI 0xF +#define EXYNOS5420_KFC_CORE_RESET0 BIT(8) +#define EXYNOS5420_KFC_ETM_RESET0 BIT(20) + +#define EXYNOS5420_KFC_CORE_RESET(_nr) \ + ((EXYNOS5420_KFC_CORE_RESET0 | EXYNOS5420_KFC_ETM_RESET0) << (_nr)) + #define EXYNOS5420_BB_CON1 0x0784 #define EXYNOS5420_BB_SEL_EN BIT(31) #define EXYNOS5420_BB_PMOS_EN BIT(7) -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
