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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>
This commit is contained in:
Olof Johansson 2014-06-02 21:47:46 -07:00 committed by Arnd Bergmann
parent 1ad58443cf
commit 1754c42e3d
3 changed files with 32 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/mach-exynos/common.h
View File

@ -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);

29
arch/arm/mach-exynos/exynos.c
View File

@ -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();

26
arch/arm/mach-exynos/platsmp.c
View File

@ -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