ARM: exynos: move sysram info to exynos.c

This solves a problem with building with CONFIG_SMP=n due to missing
sysram_base_addr (or sysram_ns_base_addr) variables.

The new setup method is more awkward than I'd like for it to be, but
it can't be done in init_early() since ioremap is not yet available,
but it needs to happen before SMP.

Reported-by: Russell King <linux@arm.linux.org.uk>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index 16617bd..1ee9176 100644 (file)
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -118,6 +118,7 @@ extern void __iomem *sysram_ns_base_addr;
 extern void __iomem *sysram_base_addr;
 void exynos_init_io(void);
 void exynos_restart(enum reboot_mode mode, const char *cmd);
+void exynos_sysram_init(void);
 void exynos_cpuidle_init(void);
 void exynos_cpufreq_init(void);
 void exynos_init_late(void);

diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 90aab4d..fb1eadd 100644 (file)
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -184,6 +184,28 @@ void __init exynos_cpufreq_init(void)
        platform_device_register_simple("exynos-cpufreq", -1, NULL, 0);
 }
 
+void __iomem *sysram_base_addr;
+void __iomem *sysram_ns_base_addr;
+
+void __init exynos_sysram_init(void)
+{
+       struct device_node *node;
+
+       for_each_compatible_node(node, NULL, "samsung,exynos4210-sysram") {
+               if (!of_device_is_available(node))
+                       continue;
+               sysram_base_addr = of_iomap(node, 0);
+               break;
+       }
+
+       for_each_compatible_node(node, NULL, "samsung,exynos4210-sysram-ns") {
+               if (!of_device_is_available(node))
+                       continue;
+               sysram_ns_base_addr = of_iomap(node, 0);
+               break;
+       }
+}
+
 void __init exynos_init_late(void)
 {
        if (of_machine_is_compatible("samsung,exynos5440"))
@@ -271,6 +293,13 @@ static void __init exynos_dt_machine_init(void)
                }
        }
 
+       /*
+        * This is called from smp_prepare_cpus if we've built for SMP, but
+        * we still need to set it up for PM and firmware ops if not.
+        */
+       if (!IS_ENABLED(SMP))
+               exynos_sysram_init();
+
        exynos_cpuidle_init();
        exynos_cpufreq_init();
 

diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
index ec02422..1c8d31e 100644 (file)
--- a/arch/arm/mach-exynos/platsmp.c
+++ b/arch/arm/mach-exynos/platsmp.c
@@ -32,28 +32,6 @@
 
 extern void exynos4_secondary_startup(void);
 
-void __iomem *sysram_base_addr;
-void __iomem *sysram_ns_base_addr;
-
-static void __init exynos_smp_prepare_sysram(void)
-{
-       struct device_node *node;
-
-       for_each_compatible_node(node, NULL, "samsung,exynos4210-sysram") {
-               if (!of_device_is_available(node))
-                       continue;
-               sysram_base_addr = of_iomap(node, 0);
-               break;
-       }
-
-       for_each_compatible_node(node, NULL, "samsung,exynos4210-sysram-ns") {
-               if (!of_device_is_available(node))
-                       continue;
-               sysram_ns_base_addr = of_iomap(node, 0);
-               break;
-       }
-}
-
 static inline void __iomem *cpu_boot_reg_base(void)
 {
        if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_1_1)
@@ -234,11 +212,11 @@ static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
 {
        int i;
 
+       exynos_sysram_init();
+
        if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9)
                scu_enable(scu_base_addr());
 
-       exynos_smp_prepare_sysram();
-
        /*
         * Write the address of secondary startup into the
         * system-wide flags register. The boot monitor waits