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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 00:43:38 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 00:43:38 +0400
commit3883cbb6c1bda013a3ce2dbdab7dc97c52e4a232 (patch)
tree5b69f83b049d24ac81123ac954ca8c9128e48443 /arch/arm/mach-mvebu/coherency.c
parentd2033f2c1d1de2239ded15e478ddb4028f192a15 (diff)
parent1eb92b24e243085d242cf5ffd64829bba70972e1 (diff)
downloadlinux-3883cbb6c1bda013a3ce2dbdab7dc97c52e4a232.tar.xz
Merge tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC specific changes from Arnd Bergmann: "These changes are all to SoC-specific code, a total of 33 branches on 17 platforms were pulled into this. Like last time, Renesas sh-mobile is now the platform with the most changes, followed by OMAP and EXYNOS. Two new platforms, TI Keystone and Rockchips RK3xxx are added in this branch, both containing almost no platform specific code at all, since they are using generic subsystem interfaces for clocks, pinctrl, interrupts etc. The device drivers are getting merged through the respective subsystem maintainer trees. One more SoC (u300) is now multiplatform capable and several others (shmobile, exynos, msm, integrator, kirkwood, clps711x) are moving towards that goal with this series but need more work. Also noteworthy is the work on PCI here, which is traditionally part of the SoC specific code. With the changes done by Thomas Petazzoni, we can now more easily have PCI host controller drivers as loadable modules and keep them separate from the platform code in drivers/pci/host. This has already led to the discovery that three platforms (exynos, spear and imx) are actually using an identical PCIe host controller and will be able to share a driver once support for spear and imx is added." * tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (480 commits) ARM: integrator: let pciv3 use mem/premem from device tree ARM: integrator: set local side PCI addresses right ARM: dts: Add pcie controller node for exynos5440-ssdk5440 ARM: dts: Add pcie controller node for Samsung EXYNOS5440 SoC ARM: EXYNOS: Enable PCIe support for Exynos5440 pci: Add PCIe driver for Samsung Exynos ARM: OMAP5: voltagedomain data: remove temporary OMAP4 voltage data ARM: keystone: Move CPU bringup code to dedicated asm file ARM: multiplatform: always pick one CPU type ARM: imx: select syscon for IMX6SL ARM: keystone: select ARM_ERRATA_798181 only for SMP ARM: imx: Synertronixx scb9328 needs to select SOC_IMX1 ARM: OMAP2+: AM43x: resolve SMP related build error dmaengine: edma: enable build for AM33XX ARM: edma: Add EDMA crossbar event mux support ARM: edma: Add DT and runtime PM support to the private EDMA API dmaengine: edma: Add TI EDMA device tree binding arm: add basic support for Rockchip RK3066a boards arm: add debug uarts for rockchip rk29xx and rk3xxx series arm: Add basic clocks for Rockchip rk3066a SoCs ...
Diffstat (limited to 'arch/arm/mach-mvebu/coherency.c')
-rw-r--r--arch/arm/mach-mvebu/coherency.c45
1 files changed, 23 insertions, 22 deletions
diff --git a/arch/arm/mach-mvebu/coherency.c b/arch/arm/mach-mvebu/coherency.c
index 8278960066c3..be117591f7f2 100644
--- a/arch/arm/mach-mvebu/coherency.c
+++ b/arch/arm/mach-mvebu/coherency.c
@@ -25,16 +25,11 @@
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <asm/smp_plat.h>
+#include <asm/cacheflush.h>
#include "armada-370-xp.h"
-/*
- * Some functions in this file are called very early during SMP
- * initialization. At that time the device tree framework is not yet
- * ready, and it is not possible to get the register address to
- * ioremap it. That's why the pointer below is given with an initial
- * value matching its virtual mapping
- */
-static void __iomem *coherency_base = ARMADA_370_XP_REGS_VIRT_BASE + 0x20200;
+unsigned long __cpuinitdata coherency_phys_base;
+static void __iomem *coherency_base;
static void __iomem *coherency_cpu_base;
/* Coherency fabric registers */
@@ -47,18 +42,6 @@ static struct of_device_id of_coherency_table[] = {
{ /* end of list */ },
};
-#ifdef CONFIG_SMP
-int coherency_get_cpu_count(void)
-{
- int reg, cnt;
-
- reg = readl(coherency_base + COHERENCY_FABRIC_CFG_OFFSET);
- cnt = (reg & 0xF) + 1;
-
- return cnt;
-}
-#endif
-
/* Function defined in coherency_ll.S */
int ll_set_cpu_coherent(void __iomem *base_addr, unsigned int hw_cpu_id);
@@ -143,13 +126,31 @@ int __init coherency_init(void)
np = of_find_matching_node(NULL, of_coherency_table);
if (np) {
+ struct resource res;
pr_info("Initializing Coherency fabric\n");
+ of_address_to_resource(np, 0, &res);
+ coherency_phys_base = res.start;
+ /*
+ * Ensure secondary CPUs will see the updated value,
+ * which they read before they join the coherency
+ * fabric, and therefore before they are coherent with
+ * the boot CPU cache.
+ */
+ sync_cache_w(&coherency_phys_base);
coherency_base = of_iomap(np, 0);
coherency_cpu_base = of_iomap(np, 1);
set_cpu_coherent(cpu_logical_map(smp_processor_id()), 0);
- bus_register_notifier(&platform_bus_type,
- &mvebu_hwcc_platform_nb);
}
return 0;
}
+
+static int __init coherency_late_init(void)
+{
+ if (of_find_matching_node(NULL, of_coherency_table))
+ bus_register_notifier(&platform_bus_type,
+ &mvebu_hwcc_platform_nb);
+ return 0;
+}
+
+postcore_initcall(coherency_late_init);