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authorLinus Torvalds <torvalds@linux-foundation.org>2017-02-24 00:33:54 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-24 00:33:54 +0100
commit6ae52c65e01991426e87bb0fb8a2ac9e032db7b1 (patch)
tree04b51ff1b9c175a115c3db9aacf210092e521179 /arch/arm/mach-ux500/platsmp.c
parentMerge tag 'armsoc-fixes-nc' of git://git.kernel.org/pub/scm/linux/kernel/git/... (diff)
parentMerge tag 'davinci-for-v4.11/soc-2' of git://git.kernel.org/pub/scm/linux/ker... (diff)
downloadlinux-6ae52c65e01991426e87bb0fb8a2ac9e032db7b1.tar.xz
linux-6ae52c65e01991426e87bb0fb8a2ac9e032db7b1.zip
Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform updates from Arnd Bergmann: "In the SoC branch we normally collect classic arch/arm/mach-* contents, i.e. C code changes for SoC platforms. This release cycle the diffstat is quite nice, in that we're removing 3x the amount of code that's being added. The main reason for this is that there's a removal of camera drivers for Freescale i.MX chips (driver was removed so the device registration isn't needed any more). There's also removal of display initialization code for OMAP that is no longer needed. The rest are mostly minor tweaks and cleanups; constification on Samsung platforms, cleanup of ux500 platform data, purge of other unused platform data/device seutp on i.MX and other good stuff. New SoC support this cycle is for two Allwinner platforms, H2+ and V3s" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (55 commits) ARM: ux500: remove deleted file from Makefile ARM: ep93xx: Disable TS-72xx watchdog before uncompressing ARM: ux500: cut some platform data MAINTAINERS: Update for the current location of the bcm2835 tree. ARM: davinci: remove BUG_ON() from da850_register_sata() ARM: davinci: da850: model the SATA refclk ARM: davinci: da850: add con_id for the SATA clock ARM: davinci: da8xx-dt: add OF_DEV_AUXDATA entry for SATA arm: mvebu: support for SMP on 98DX3336 SoC dt-bindings: video: exynos7-decon: Remove obsolete samsung,power-domain property soc: dove: constify reset_control_ops structures ARM: mv78xx0: fix possible PCI buffer overflow MAINTAINERS: transfer maintainership for the EZX platform ARM: shmobile: rcar-gen2: Add more register documentation ARM: tegra: paz00: Fix __initdata placement ARM: OMAP: clock: Remove unused mpurate cmdline option ARM: davinci: add skeleton for pdata-quirks arm: sunxi: add support for V3s SoC ARM: OMAP2+: omap_hwmod: Add support for earlycon arm: hisi: drop extern hip01_cpu_die ...
Diffstat (limited to 'arch/arm/mach-ux500/platsmp.c')
-rw-r--r--arch/arm/mach-ux500/platsmp.c45
1 files changed, 19 insertions, 26 deletions
diff --git a/arch/arm/mach-ux500/platsmp.c b/arch/arm/mach-ux500/platsmp.c
index 8f2f615ff958..e0ee139fdebf 100644
--- a/arch/arm/mach-ux500/platsmp.c
+++ b/arch/arm/mach-ux500/platsmp.c
@@ -31,10 +31,14 @@
#define UX500_CPU1_JUMPADDR_OFFSET 0x1FF4
#define UX500_CPU1_WAKEMAGIC_OFFSET 0x1FF0
-static void wakeup_secondary(void)
+static void __iomem *backupram;
+
+static void __init ux500_smp_prepare_cpus(unsigned int max_cpus)
{
struct device_node *np;
- static void __iomem *backupram;
+ static void __iomem *scu_base;
+ unsigned int ncores;
+ int i;
np = of_find_compatible_node(NULL, NULL, "ste,dbx500-backupram");
if (!np) {
@@ -48,29 +52,6 @@ static void wakeup_secondary(void)
return;
}
- /*
- * write the address of secondary startup into the backup ram register
- * at offset 0x1FF4, then write the magic number 0xA1FEED01 to the
- * backup ram register at offset 0x1FF0, which is what boot rom code
- * is waiting for. This will wake up the secondary core from WFE.
- */
- writel(virt_to_phys(secondary_startup),
- backupram + UX500_CPU1_JUMPADDR_OFFSET);
- writel(0xA1FEED01,
- backupram + UX500_CPU1_WAKEMAGIC_OFFSET);
-
- /* make sure write buffer is drained */
- mb();
- iounmap(backupram);
-}
-
-static void __init ux500_smp_prepare_cpus(unsigned int max_cpus)
-{
- struct device_node *np;
- static void __iomem *scu_base;
- unsigned int ncores;
- int i;
-
np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
if (!np) {
pr_err("No SCU base address\n");
@@ -92,7 +73,19 @@ static void __init ux500_smp_prepare_cpus(unsigned int max_cpus)
static int ux500_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
- wakeup_secondary();
+ /*
+ * write the address of secondary startup into the backup ram register
+ * at offset 0x1FF4, then write the magic number 0xA1FEED01 to the
+ * backup ram register at offset 0x1FF0, which is what boot rom code
+ * is waiting for. This will wake up the secondary core from WFE.
+ */
+ writel(virt_to_phys(secondary_startup),
+ backupram + UX500_CPU1_JUMPADDR_OFFSET);
+ writel(0xA1FEED01,
+ backupram + UX500_CPU1_WAKEMAGIC_OFFSET);
+
+ /* make sure write buffer is drained */
+ mb();
arch_send_wakeup_ipi_mask(cpumask_of(cpu));
return 0;
}