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authorLinus Torvalds <torvalds@linux-foundation.org>2015-09-01 12:18:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-01 12:18:40 -0700
commit50686e8a3aed2f5d295e9d2e79ff43df461c7b76 (patch)
treee5de912d74c6e1d75e6ecf75f2a62c313955baff /arch/arm/mach-sti
parentc5fc249862af862df027030188cc083e072ecd19 (diff)
parent1ec6f701707e4e97e451ff8b662360f1262a6c59 (diff)
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Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform updates from Olof Johansson: "New or improved SoC support: - add support for Atmel's SAMA5D2 SoC - add support for Freescale i.MX6UL - improved support for TI's DM814x platform - misc fixes and improvements for RockChip platforms - Marvell MVEBU suspend/resume support A few driver changes that ideally would belong in the drivers branch are also here (acked by appropriate maintainers): - power key input driver for Freescale platforms (svns) - RTC driver updates for Freescale platforms (svns/mxc) - clk fixes for TI DM814/816X + a bunch of other changes for various platforms" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (83 commits) ARM: rockchip: pm: Fix PTR_ERR() argument ARM: imx: mach-imx6ul: Fix allmodconfig build clk: ti: fix for definition movement ARM: uniphier: drop v7_invalidate_l1 call at secondary entry memory: kill off set_irq_flags usage rtc: snvs: select option REGMAP_MMIO ARM: brcmstb: select ARCH_DMA_ADDR_T_64BIT for LPAE ARM: BCM: Enable ARM erratum 798181 for BRCMSTB ARM: OMAP2+: Fix power domain operations regression caused by 81xx ARM: rockchip: enable PMU_GPIOINT_WAKEUP_EN when entering shallow suspend ARM: rockchip: set correct stabilization thresholds in suspend ARM: rockchip: rename osc_switch_to_32k variable ARM: imx6ul: add fec MAC refrence clock and phy fixup init ARM: imx6ul: add fec bits to GPR syscon definition rtc: mxc: add support of device tree dt-binding: document the binding for mxc rtc rtc: mxc: use a second rtc clock ARM: davinci: cp_intc: use IRQCHIP_SKIP_SET_WAKE instead of irq_set_wake callback soc: mediatek: Fix SCPSYS compilation ARM: at91/soc: add basic support for new sama5d2 SoC ...
Diffstat (limited to 'arch/arm/mach-sti')
-rw-r--r--arch/arm/mach-sti/headsmp.S1
-rw-r--r--arch/arm/mach-sti/platsmp.c57
-rw-r--r--arch/arm/mach-sti/smp.h2
3 files changed, 55 insertions, 5 deletions
diff --git a/arch/arm/mach-sti/headsmp.S b/arch/arm/mach-sti/headsmp.S
index 4c09bae86edf..e0ad451700d5 100644
--- a/arch/arm/mach-sti/headsmp.S
+++ b/arch/arm/mach-sti/headsmp.S
@@ -37,6 +37,7 @@ pen: ldr r7, [r6]
* should now contain the SVC stack for this core
*/
b secondary_startup
+ENDPROC(sti_secondary_startup)
1: .long .
.long pen_release
diff --git a/arch/arm/mach-sti/platsmp.c b/arch/arm/mach-sti/platsmp.c
index d4b624f8dfcb..c4ad6eae67fa 100644
--- a/arch/arm/mach-sti/platsmp.c
+++ b/arch/arm/mach-sti/platsmp.c
@@ -20,6 +20,7 @@
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/memblock.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
@@ -38,8 +39,6 @@ static DEFINE_SPINLOCK(boot_lock);
static void sti_secondary_init(unsigned int cpu)
{
- trace_hardirqs_off();
-
/*
* let the primary processor know we're out of the
* pen, then head off into the C entry point
@@ -99,14 +98,62 @@ static int sti_boot_secondary(unsigned int cpu, struct task_struct *idle)
static void __init sti_smp_prepare_cpus(unsigned int max_cpus)
{
- void __iomem *scu_base = NULL;
- struct device_node *np = of_find_compatible_node(
- NULL, NULL, "arm,cortex-a9-scu");
+ struct device_node *np;
+ void __iomem *scu_base;
+ u32 __iomem *cpu_strt_ptr;
+ u32 release_phys;
+ int cpu;
+ unsigned long entry_pa = virt_to_phys(sti_secondary_startup);
+
+ np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
+
if (np) {
scu_base = of_iomap(np, 0);
scu_enable(scu_base);
of_node_put(np);
}
+
+ if (max_cpus <= 1)
+ return;
+
+ for_each_possible_cpu(cpu) {
+
+ np = of_get_cpu_node(cpu, NULL);
+
+ if (!np)
+ continue;
+
+ if (of_property_read_u32(np, "cpu-release-addr",
+ &release_phys)) {
+ pr_err("CPU %d: missing or invalid cpu-release-addr "
+ "property\n", cpu);
+ continue;
+ }
+
+ /*
+ * holding pen is usually configured in SBC DMEM but can also be
+ * in RAM.
+ */
+
+ if (!memblock_is_memory(release_phys))
+ cpu_strt_ptr =
+ ioremap(release_phys, sizeof(release_phys));
+ else
+ cpu_strt_ptr =
+ (u32 __iomem *)phys_to_virt(release_phys);
+
+ __raw_writel(entry_pa, cpu_strt_ptr);
+
+ /*
+ * wmb so that data is actually written
+ * before cache flush is done
+ */
+ smp_wmb();
+ sync_cache_w(cpu_strt_ptr);
+
+ if (!memblock_is_memory(release_phys))
+ iounmap(cpu_strt_ptr);
+ }
}
struct smp_operations __initdata sti_smp_ops = {
diff --git a/arch/arm/mach-sti/smp.h b/arch/arm/mach-sti/smp.h
index 1871b72b1a7e..ae22707d301f 100644
--- a/arch/arm/mach-sti/smp.h
+++ b/arch/arm/mach-sti/smp.h
@@ -14,4 +14,6 @@
extern struct smp_operations sti_smp_ops;
+void sti_secondary_startup(void);
+
#endif