sh: Force boot CPU in to light sleep mode for SH-X3 SMP.

All of the secondary CPUs are forced in to light sleep mode, but we were
missing the same initialization for the boot CPU. This resulted in
inconsistent sleep modes depending on which CPU we were on, confusing the
idle loop when not polling.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/arch/sh/kernel/cpu/sh4a/smp-shx3.c b/arch/sh/kernel/cpu/sh4a/smp-shx3.c
index 185ec3976a25c18d1973f5bce3dd256359344b65..5863e0c4d02f03e9d4993bc4197736410cd00401 100644 (file)
--- a/arch/sh/kernel/cpu/sh4a/smp-shx3.c
+++ b/arch/sh/kernel/cpu/sh4a/smp-shx3.c
@@ -14,6 +14,13 @@
 #include <linux/interrupt.h>
 #include <linux/io.h>
 
+#define STBCR_REG(phys_id) (0xfe400004 | (phys_id << 12))
+#define RESET_REG(phys_id) (0xfe400008 | (phys_id << 12))
+
+#define STBCR_MSTP     0x00000001
+#define STBCR_RESET    0x00000002
+#define STBCR_LTSLP    0x80000000
+
 static irqreturn_t ipi_interrupt_handler(int irq, void *arg)
 {
        unsigned int message = (unsigned int)(long)arg;
@@ -21,9 +28,9 @@ static irqreturn_t ipi_interrupt_handler(int irq, void *arg)
        unsigned int offs = 4 * cpu;
        unsigned int x;
 
-       x = ctrl_inl(0xfe410070 + offs); /* C0INITICI..CnINTICI */
+       x = __raw_readl(0xfe410070 + offs); /* C0INITICI..CnINTICI */
        x &= (1 << (message << 2));
-       ctrl_outl(x, 0xfe410080 + offs); /* C0INTICICLR..CnINTICICLR */
+       __raw_writel(x, 0xfe410080 + offs); /* C0INTICICLR..CnINTICICLR */
 
        smp_message_recv(message);
 
@@ -37,6 +44,9 @@ void __init plat_smp_setup(void)
 
        init_cpu_possible(cpumask_of(cpu));
 
+       /* Enable light sleep for the boot CPU */
+       __raw_writel(__raw_readl(STBCR_REG(cpu)) | STBCR_LTSLP, STBCR_REG(cpu));
+
        __cpu_number_map[0] = 0;
        __cpu_logical_map[0] = 0;
 
@@ -66,32 +76,23 @@ void __init plat_prepare_cpus(unsigned int max_cpus)
                            "IPI", (void *)(long)i);
 }
 
-#define STBCR_REG(phys_id) (0xfe400004 | (phys_id << 12))
-#define RESET_REG(phys_id) (0xfe400008 | (phys_id << 12))
-
-#define STBCR_MSTP     0x00000001
-#define STBCR_RESET    0x00000002
-#define STBCR_LTSLP    0x80000000
-
-#define STBCR_AP_VAL   (STBCR_RESET | STBCR_LTSLP)
-
 void plat_start_cpu(unsigned int cpu, unsigned long entry_point)
 {
-       ctrl_outl(entry_point, RESET_REG(cpu));
+       __raw_writel(entry_point, RESET_REG(cpu));
 
-       if (!(ctrl_inl(STBCR_REG(cpu)) & STBCR_MSTP))
-               ctrl_outl(STBCR_MSTP, STBCR_REG(cpu));
+       if (!(__raw_readl(STBCR_REG(cpu)) & STBCR_MSTP))
+               __raw_writel(STBCR_MSTP, STBCR_REG(cpu));
 
-       while (!(ctrl_inl(STBCR_REG(cpu)) & STBCR_MSTP))
+       while (!(__raw_readl(STBCR_REG(cpu)) & STBCR_MSTP))
                cpu_relax();
 
        /* Start up secondary processor by sending a reset */
-       ctrl_outl(STBCR_AP_VAL, STBCR_REG(cpu));
+       __raw_writel(STBCR_RESET | STBCR_LTSLP, STBCR_REG(cpu));
 }
 
 int plat_smp_processor_id(void)
 {
-       return ctrl_inl(0xff000048); /* CPIDR */
+       return __raw_readl(0xff000048); /* CPIDR */
 }
 
 void plat_send_ipi(unsigned int cpu, unsigned int message)
@@ -100,5 +101,5 @@ void plat_send_ipi(unsigned int cpu, unsigned int message)
 
        BUG_ON(cpu >= 4);
 
-       ctrl_outl(1 << (message << 2), addr); /* C0INTICI..CnINTICI */
+       __raw_writel(1 << (message << 2), addr); /* C0INTICI..CnINTICI */
 }