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Revert "ARM: shmobile: sh73a0: Replace modify_scu_cpu_psr with scu_power_mode" 

This reverts commit e721295185.

The code changes the flags of the wrong cpus - which breaks the whole
bootup of secondary CPUs.

Cc: Bastian Hecht <hechtb@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Simon Horman 2012-11-13 11:42:28 +09:00
parent 40937f7460
commit d5bea23c82
1 changed files with 21 additions and 2 deletions
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23
arch/arm/mach-shmobile/smp-sh73a0.c
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@ -41,6 +41,9 @@ static void __iomem *scu_base_addr(void)
return (void __iomem *)0xf0000000; return (void __iomem *)0xf0000000;
} }
static DEFINE_SPINLOCK(scu_lock);
static unsigned long tmp;
#ifdef CONFIG_HAVE_ARM_TWD #ifdef CONFIG_HAVE_ARM_TWD
static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, 0xf0000600, 29); static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, 0xf0000600, 29);
void __init sh73a0_register_twd(void) void __init sh73a0_register_twd(void)
@ -49,6 +52,20 @@ void __init sh73a0_register_twd(void)
} }
#endif #endif
static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
{
void __iomem *scu_base = scu_base_addr();
spin_lock(&scu_lock);
tmp = __raw_readl(scu_base + 8);
tmp &= ~clr;
tmp |= set;
spin_unlock(&scu_lock);
/* disable cache coherency after releasing the lock */
__raw_writel(tmp, scu_base + 8);
}
static unsigned int __init sh73a0_get_core_count(void) static unsigned int __init sh73a0_get_core_count(void)
{ {
void __iomem *scu_base = scu_base_addr(); void __iomem *scu_base = scu_base_addr();
@ -66,7 +83,7 @@ static int __cpuinit sh73a0_boot_secondary(unsigned int cpu, struct task_struct
cpu = cpu_logical_map(cpu); cpu = cpu_logical_map(cpu);
/* enable cache coherency */ /* enable cache coherency */
scu_power_mode(scu_base_addr(), 0); modify_scu_cpu_psr(0, 3 << (cpu * 8));
if (((__raw_readl(PSTR) >> (4 * cpu)) & 3) == 3) if (((__raw_readl(PSTR) >> (4 * cpu)) & 3) == 3)
__raw_writel(1 << cpu, WUPCR); /* wake up */ __raw_writel(1 << cpu, WUPCR); /* wake up */
@ -78,6 +95,8 @@ static int __cpuinit sh73a0_boot_secondary(unsigned int cpu, struct task_struct
static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus) static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
{ {
int cpu = cpu_logical_map(0);
scu_enable(scu_base_addr()); scu_enable(scu_base_addr());
/* Map the reset vector (in headsmp.S) */ /* Map the reset vector (in headsmp.S) */
@ -85,7 +104,7 @@ static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
__raw_writel(__pa(shmobile_secondary_vector), SBAR); __raw_writel(__pa(shmobile_secondary_vector), SBAR);
/* enable cache coherency on CPU0 */ /* enable cache coherency on CPU0 */
scu_power_mode(scu_base_addr(), 0); modify_scu_cpu_psr(0, 3 << (cpu * 8));
} }
static void __init sh73a0_smp_init_cpus(void) static void __init sh73a0_smp_init_cpus(void)