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| author | Ingo Molnar <mingo@kernel.org> | 2014-08-22 10:04:15 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-08-22 10:04:15 +0200 |
| commit | 80b304fd00e8b667775ff791121b61ecd7cd0c03 (patch) | |
| tree | b4f2ec59fe062c43343ee4c2f10a6bcd0e4dcd1b /arch/arm/mach-hisi/hotplug.c | |
| parent | x86_32, entry: Clean up sysenter_badsys declaration (diff) | |
| parent | efi/arm64: Store Runtime Services revision (diff) | |
| download | linux-80b304fd00e8b667775ff791121b61ecd7cd0c03.tar.xz linux-80b304fd00e8b667775ff791121b61ecd7cd0c03.zip | |
Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent
Pull EFI fixes from Matt Fleming:
* WARN_ON(!spin_is_locked()) always triggers on non-SMP machines.
Swap it for the more canonical lockdep_assert_held() which always
does the right thing - Guenter Roeck
* Assign the correct value to efi.runtime_version on arm64 so that all
the runtime services can be invoked - Semen Protsenko
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/mach-hisi/hotplug.c')
| -rw-r--r-- | arch/arm/mach-hisi/hotplug.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/arm/mach-hisi/hotplug.c b/arch/arm/mach-hisi/hotplug.c index abd441b0c604..84e6919f68c7 100644 --- a/arch/arm/mach-hisi/hotplug.c +++ b/arch/arm/mach-hisi/hotplug.c @@ -57,6 +57,14 @@ #define CPU0_NEON_SRST_REQ_EN (1 << 4) #define CPU0_SRST_REQ_EN (1 << 0) +#define HIX5HD2_PERI_CRG20 0x50 +#define CRG20_CPU1_RESET (1 << 17) + +#define HIX5HD2_PERI_PMC0 0x1000 +#define PMC0_CPU1_WAIT_MTCOMS_ACK (1 << 8) +#define PMC0_CPU1_PMC_ENABLE (1 << 7) +#define PMC0_CPU1_POWERDOWN (1 << 3) + enum { HI3620_CTRL, ERROR_CTRL, @@ -157,6 +165,50 @@ void hi3xxx_set_cpu(int cpu, bool enable) set_cpu_hi3620(cpu, enable); } +static bool hix5hd2_hotplug_init(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "hisilicon,cpuctrl"); + if (np) { + ctrl_base = of_iomap(np, 0); + return true; + } + return false; +} + +void hix5hd2_set_cpu(int cpu, bool enable) +{ + u32 val = 0; + + if (!ctrl_base) + if (!hix5hd2_hotplug_init()) + BUG(); + + if (enable) { + /* power on cpu1 */ + val = readl_relaxed(ctrl_base + HIX5HD2_PERI_PMC0); + val &= ~(PMC0_CPU1_WAIT_MTCOMS_ACK | PMC0_CPU1_POWERDOWN); + val |= PMC0_CPU1_PMC_ENABLE; + writel_relaxed(val, ctrl_base + HIX5HD2_PERI_PMC0); + /* unreset */ + val = readl_relaxed(ctrl_base + HIX5HD2_PERI_CRG20); + val &= ~CRG20_CPU1_RESET; + writel_relaxed(val, ctrl_base + HIX5HD2_PERI_CRG20); + } else { + /* power down cpu1 */ + val = readl_relaxed(ctrl_base + HIX5HD2_PERI_PMC0); + val |= PMC0_CPU1_PMC_ENABLE | PMC0_CPU1_POWERDOWN; + val &= ~PMC0_CPU1_WAIT_MTCOMS_ACK; + writel_relaxed(val, ctrl_base + HIX5HD2_PERI_PMC0); + + /* reset */ + val = readl_relaxed(ctrl_base + HIX5HD2_PERI_CRG20); + val |= CRG20_CPU1_RESET; + writel_relaxed(val, ctrl_base + HIX5HD2_PERI_CRG20); + } +} + static inline void cpu_enter_lowpower(void) { unsigned int v; @@ -199,4 +251,10 @@ int hi3xxx_cpu_kill(unsigned int cpu) hi3xxx_set_cpu(cpu, false); return 1; } + +void hix5hd2_cpu_die(unsigned int cpu) +{ + flush_cache_all(); + hix5hd2_set_cpu(cpu, false); +} #endif |