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| author | Javi Merino <javi.merino@arm.com> | 2013-01-31 20:09:04 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-03-20 17:22:12 +0000 |
| commit | 3e98fdacc59bbbdbb659be1a144ccc48ed4860fa (patch) | |
| tree | 2883828516c7f88b2f63138dfc28c93cb5b26b35 /arch | |
| parent | de79a64d61ed3f7ccec9f9661fab2f3e97256243 (diff) | |
| download | linux-stable-3e98fdacc59bbbdbb659be1a144ccc48ed4860fa.tar.gz linux-stable-3e98fdacc59bbbdbb659be1a144ccc48ed4860fa.tar.bz2 linux-stable-3e98fdacc59bbbdbb659be1a144ccc48ed4860fa.zip | |
arm64: kernel: make the pen of the secondary a 64-bit unsigned value
Change the prototype of write_pen_release() accordingly and clarify
that's holding the hardware id of the secondary that's going to boot.
This is in preparation of getting HWIDs parsed from the DT.
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/include/asm/cputype.h | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp.c | 10 |
2 files changed, 7 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index 7a317029e735..9397a17bec0b 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -26,6 +26,8 @@ #define ID_AA64ISAR0_EL1 "id_aa64isar0_el1" #define ID_AA64MMFR0_EL1 "id_aa64mmfr0_el1" +#define INVALID_HWID ULONG_MAX + #define read_cpuid(reg) ({ \ u64 __val; \ asm("mrs %0, " reg : "=r" (__val)); \ diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index bdd34597254b..a57a373d305f 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -53,7 +53,7 @@ * where to place its SVC stack */ struct secondary_data secondary_data; -volatile unsigned long secondary_holding_pen_release = -1; +volatile unsigned long secondary_holding_pen_release = INVALID_HWID; enum ipi_msg_type { IPI_RESCHEDULE, @@ -70,7 +70,7 @@ static DEFINE_RAW_SPINLOCK(boot_lock); * in coherency or not. This is necessary for the hotplug code to work * reliably. */ -static void __cpuinit write_pen_release(int val) +static void __cpuinit write_pen_release(u64 val) { void *start = (void *)&secondary_holding_pen_release; unsigned long size = sizeof(secondary_holding_pen_release); @@ -105,7 +105,7 @@ static int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) timeout = jiffies + (1 * HZ); while (time_before(jiffies, timeout)) { - if (secondary_holding_pen_release == -1UL) + if (secondary_holding_pen_release == INVALID_HWID) break; udelay(10); } @@ -116,7 +116,7 @@ static int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) */ raw_spin_unlock(&boot_lock); - return secondary_holding_pen_release != -1 ? -ENOSYS : 0; + return secondary_holding_pen_release != INVALID_HWID ? -ENOSYS : 0; } static DECLARE_COMPLETION(cpu_running); @@ -190,7 +190,7 @@ asmlinkage void __cpuinit secondary_start_kernel(void) * Let the primary processor know we're out of the * pen, then head off into the C entry point */ - write_pen_release(-1); + write_pen_release(INVALID_HWID); /* * Synchronise with the boot thread. |