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ARM: EXYNOS4: Add functions for gic interrupt handling

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This patch adds two functions for gic interrupt handling.
1. Add interrupt handling of 4 cores.
2. Dynamically set gic bank offset according to the type of soc.
   Gic bank offset of EXYNOS4412 is 0x4000 while the offset of
   EXYNOS4210 and EXYNOS4212 is 0x8000.

This patch is necessary because EXYNOS4 socs cannot support
GIC register banking as described in commit aab74d3e75.

Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Changhwan Youn 2011-10-04 17:08:57 +09:00 committed by Kukjin Kim
parent b88b1cc72e
commit 90a454b4c5
4 changed files with 27 additions and 10 deletions
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8
arch/arm/mach-exynos4/cpu.c
View File

@ -32,6 +32,8 @@
#include <mach/regs-irq.h>
#include <mach/regs-pmu.h>
unsigned int gic_bank_offset __read_mostly;
extern int combiner_init(unsigned int combiner_nr, void __iomem *base,
unsigned int irq_start);
extern void combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq);
@ -203,16 +205,18 @@ static void exynos4_gic_irq_fix_base(struct irq_data *d)
struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
gic_data->cpu_base = S5P_VA_GIC_CPU +
(EXYNOS4_GIC_BANK_OFFSET * smp_processor_id());
(gic_bank_offset * smp_processor_id());
gic_data->dist_base = S5P_VA_GIC_DIST +
(EXYNOS4_GIC_BANK_OFFSET * smp_processor_id());
(gic_bank_offset * smp_processor_id());
}
void __init exynos4_init_irq(void)
{
int irq;
gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000;
gic_init(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU);
gic_arch_extn.irq_eoi = exynos4_gic_irq_fix_base;
gic_arch_extn.irq_unmask = exynos4_gic_irq_fix_base;

23
arch/arm/mach-exynos4/include/mach/entry-macro.S
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@ -17,12 +17,25 @@
.endm
.macro get_irqnr_preamble, base, tmp
ldr \base, =gic_cpu_base_addr
mov \tmp, #0
mrc p15, 0, \base, c0, c0, 5
and \base, \base, #3
cmp \base, #0
beq 1f
ldr \tmp, =gic_bank_offset
ldr \tmp, [\tmp]
cmp \base, #1
beq 1f
cmp \base, #2
addeq \tmp, \tmp, \tmp
addne \tmp, \tmp, \tmp, LSL #1
1: ldr \base, =gic_cpu_base_addr
ldr \base, [\base]
mrc p15, 0, \tmp, c0, c0, 5
and \tmp, \tmp, #3
cmp \tmp, #1
addeq \base, \base, #EXYNOS4_GIC_BANK_OFFSET
add \base, \base, \tmp
.endm
.macro arch_ret_to_user, tmp1, tmp2

1
arch/arm/mach-exynos4/include/mach/map.h
View File

@ -62,7 +62,6 @@
#define EXYNOS4_PA_GIC_CPU 0x10480000
#define EXYNOS4_PA_GIC_DIST 0x10490000
#define EXYNOS4_GIC_BANK_OFFSET 0x8000
#define EXYNOS4_PA_COREPERI 0x10500000
#define EXYNOS4_PA_TWD 0x10500600

5
arch/arm/mach-exynos4/platsmp.c
View File

@ -32,6 +32,7 @@
#include <plat/cpu.h>
extern unsigned int gic_bank_offset;
extern void exynos4_secondary_startup(void);
#define CPU1_BOOT_REG (samsung_rev() == EXYNOS4210_REV_1_1 ? \
@ -67,9 +68,9 @@ static DEFINE_SPINLOCK(boot_lock);
static void __cpuinit exynos4_gic_secondary_init(void)
{
void __iomem *dist_base = S5P_VA_GIC_DIST +
(EXYNOS4_GIC_BANK_OFFSET * smp_processor_id());
(gic_bank_offset * smp_processor_id());
void __iomem *cpu_base = S5P_VA_GIC_CPU +
(EXYNOS4_GIC_BANK_OFFSET * smp_processor_id());
(gic_bank_offset * smp_processor_id());
int i;
/*