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Merge Realview GIC code

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This commit is contained in:
Russell King 2007-02-15 15:07:40 +00:00 committed by Russell King
commit 4ba9dcbeba
11 changed files with 168 additions and 26 deletions
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109
arch/arm/common/gic.c
View file

@ -14,7 +14,9 @@
*
* o There is one CPU Interface per CPU, which sends interrupts sent
* by the Distributor, and interrupts generated locally, to the
* associated CPU.
* associated CPU. The base address of the CPU interface is usually
* aliased so that the same address points to different chips depending
* on the CPU it is accessed from.
*
* Note that IRQs 0-31 are special - they are local to each CPU.
* As such, the enable set/clear, pending set/clear and active bit
@ -31,10 +33,38 @@
#include <asm/mach/irq.h>
#include <asm/hardware/gic.h>
static void __iomem *gic_dist_base;
static void __iomem *gic_cpu_base;
static DEFINE_SPINLOCK(irq_controller_lock);
struct gic_chip_data {
unsigned int irq_offset;
void __iomem *dist_base;
void __iomem *cpu_base;
};
#ifndef MAX_GIC_NR
#define MAX_GIC_NR 1
#endif
static struct gic_chip_data gic_data[MAX_GIC_NR];
static inline void __iomem *gic_dist_base(unsigned int irq)
{
struct gic_chip_data *gic_data = get_irq_chip_data(irq);
return gic_data->dist_base;
}
static inline void __iomem *gic_cpu_base(unsigned int irq)
{
struct gic_chip_data *gic_data = get_irq_chip_data(irq);
return gic_data->cpu_base;
}
static inline unsigned int gic_irq(unsigned int irq)
{
struct gic_chip_data *gic_data = get_irq_chip_data(irq);
return irq - gic_data->irq_offset;
}
/*
* Routines to acknowledge, disable and enable interrupts
*
@ -55,8 +85,8 @@ static void gic_ack_irq(unsigned int irq)
u32 mask = 1 << (irq % 32);
spin_lock(&irq_controller_lock);
writel(mask, gic_dist_base + GIC_DIST_ENABLE_CLEAR + (irq / 32) * 4);
writel(irq, gic_cpu_base + GIC_CPU_EOI);
writel(mask, gic_dist_base(irq) + GIC_DIST_ENABLE_CLEAR + (gic_irq(irq) / 32) * 4);
writel(gic_irq(irq), gic_cpu_base(irq) + GIC_CPU_EOI);
spin_unlock(&irq_controller_lock);
}
@ -65,7 +95,7 @@ static void gic_mask_irq(unsigned int irq)
u32 mask = 1 << (irq % 32);
spin_lock(&irq_controller_lock);
writel(mask, gic_dist_base + GIC_DIST_ENABLE_CLEAR + (irq / 32) * 4);
writel(mask, gic_dist_base(irq) + GIC_DIST_ENABLE_CLEAR + (gic_irq(irq) / 32) * 4);
spin_unlock(&irq_controller_lock);
}
@ -74,14 +104,14 @@ static void gic_unmask_irq(unsigned int irq)
u32 mask = 1 << (irq % 32);
spin_lock(&irq_controller_lock);
writel(mask, gic_dist_base + GIC_DIST_ENABLE_SET + (irq / 32) * 4);
writel(mask, gic_dist_base(irq) + GIC_DIST_ENABLE_SET + (gic_irq(irq) / 32) * 4);
spin_unlock(&irq_controller_lock);
}
#ifdef CONFIG_SMP
static void gic_set_cpu(unsigned int irq, cpumask_t mask_val)
{
void __iomem *reg = gic_dist_base + GIC_DIST_TARGET + (irq & ~3);
void __iomem *reg = gic_dist_base(irq) + GIC_DIST_TARGET + (gic_irq(irq) & ~3);
unsigned int shift = (irq % 4) * 8;
unsigned int cpu = first_cpu(mask_val);
u32 val;
@ -95,6 +125,37 @@ static void gic_set_cpu(unsigned int irq, cpumask_t mask_val)
}
#endif
static void fastcall gic_handle_cascade_irq(unsigned int irq,
struct irq_desc *desc)
{
struct gic_chip_data *chip_data = get_irq_data(irq);
struct irq_chip *chip = get_irq_chip(irq);
unsigned int cascade_irq;
unsigned long status;
/* primary controller ack'ing */
chip->ack(irq);
spin_lock(&irq_controller_lock);
status = readl(chip_data->cpu_base + GIC_CPU_INTACK);
spin_unlock(&irq_controller_lock);
cascade_irq = (status & 0x3ff);
if (cascade_irq > 1020)
goto out;
if (cascade_irq < 32 || cascade_irq >= NR_IRQS) {
do_bad_IRQ(cascade_irq, desc);
goto out;
}
cascade_irq += chip_data->irq_offset;
generic_handle_irq(cascade_irq);
out:
/* primary controller unmasking */
chip->unmask(irq);
}
static struct irq_chip gic_chip = {
.name = "GIC",
.ack = gic_ack_irq,
@ -105,15 +166,29 @@ static struct irq_chip gic_chip = {
#endif
};
void __init gic_dist_init(void __iomem *base)
void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq)
{
if (gic_nr >= MAX_GIC_NR)
BUG();
if (set_irq_data(irq, &gic_data[gic_nr]) != 0)
BUG();
set_irq_chained_handler(irq, gic_handle_cascade_irq);
}
void __init gic_dist_init(unsigned int gic_nr, void __iomem *base,
unsigned int irq_start)
{
unsigned int max_irq, i;
u32 cpumask = 1 << smp_processor_id();
if (gic_nr >= MAX_GIC_NR)
BUG();
cpumask |= cpumask << 8;
cpumask |= cpumask << 16;
gic_dist_base = base;
gic_data[gic_nr].dist_base = base;
gic_data[gic_nr].irq_offset = (irq_start - 1) & ~31;
writel(0, base + GIC_DIST_CTRL);
@ -158,8 +233,9 @@ void __init gic_dist_init(void __iomem *base)
/*
* Setup the Linux IRQ subsystem.
*/
for (i = 29; i < max_irq; i++) {
for (i = irq_start; i < gic_data[gic_nr].irq_offset + max_irq; i++) {
set_irq_chip(i, &gic_chip);
set_irq_chip_data(i, &gic_data[gic_nr]);
set_irq_handler(i, handle_level_irq);
set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
}
@ -167,9 +243,13 @@ void __init gic_dist_init(void __iomem *base)
writel(1, base + GIC_DIST_CTRL);
}
void __cpuinit gic_cpu_init(void __iomem *base)
void __cpuinit gic_cpu_init(unsigned int gic_nr, void __iomem *base)
{
gic_cpu_base = base;
if (gic_nr >= MAX_GIC_NR)
BUG();
gic_data[gic_nr].cpu_base = base;
writel(0xf0, base + GIC_CPU_PRIMASK);
writel(1, base + GIC_CPU_CTRL);
}
@ -179,6 +259,7 @@ void gic_raise_softirq(cpumask_t cpumask, unsigned int irq)
{
unsigned long map = *cpus_addr(cpumask);
writel(map << 16 | irq, gic_dist_base + GIC_DIST_SOFTINT);
/* this always happens on GIC0 */
writel(map << 16 | irq, gic_data[0].dist_base + GIC_DIST_SOFTINT);
}
#endif

10
arch/arm/mach-realview/Kconfig
View file

@ -16,4 +16,14 @@ config REALVIEW_MPCORE
kernel built with this option enabled is not compatible with
other tiles.
config REALVIEW_MPCORE_REVB
bool "Support MPcore RevB tile"
depends on REALVIEW_MPCORE
default n
help
Enable support for the MPCore RevB tile on the Realview platform.
Since there are device address differences, a
kernel built with this option enabled is not compatible with
other tiles.
endmenu

2
arch/arm/mach-realview/platsmp.c
View file

@ -52,7 +52,7 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
* core (e.g. timer irq), then they will not have been enabled
* for us: do so
*/
gic_cpu_init(__io_address(REALVIEW_GIC_CPU_BASE));
gic_cpu_init(0, __io_address(REALVIEW_GIC_CPU_BASE));
/*
* let the primary processor know we're out of the

27
arch/arm/mach-realview/realview_eb.c
View file

@ -57,7 +57,21 @@ static struct map_desc realview_eb_io_desc[] __initdata = {
.pfn = __phys_to_pfn(REALVIEW_GIC_DIST_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
},
#ifdef CONFIG_REALVIEW_MPCORE
{
.virtual = IO_ADDRESS(REALVIEW_GIC1_CPU_BASE),
.pfn = __phys_to_pfn(REALVIEW_GIC1_CPU_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_GIC1_DIST_BASE),
.pfn = __phys_to_pfn(REALVIEW_GIC1_DIST_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
},
#endif
{
.virtual = IO_ADDRESS(REALVIEW_SCTL_BASE),
.pfn = __phys_to_pfn(REALVIEW_SCTL_BASE),
.length = SZ_4K,
@ -138,13 +152,18 @@ static void __init gic_init_irq(void)
#ifdef CONFIG_REALVIEW_MPCORE
unsigned int pldctrl;
writel(0x0000a05f, __io_address(REALVIEW_SYS_LOCK));
pldctrl = readl(__io_address(REALVIEW_SYS_BASE) + 0xd8);
pldctrl = readl(__io_address(REALVIEW_SYS_BASE) + REALVIEW_MPCORE_SYS_PLD_CTRL1);
pldctrl |= 0x00800000; /* New irq mode */
writel(pldctrl, __io_address(REALVIEW_SYS_BASE) + 0xd8);
writel(pldctrl, __io_address(REALVIEW_SYS_BASE) + REALVIEW_MPCORE_SYS_PLD_CTRL1);
writel(0x00000000, __io_address(REALVIEW_SYS_LOCK));
#endif
gic_dist_init(__io_address(REALVIEW_GIC_DIST_BASE));
gic_cpu_init(__io_address(REALVIEW_GIC_CPU_BASE));
gic_dist_init(0, __io_address(REALVIEW_GIC_DIST_BASE), 29);
gic_cpu_init(0, __io_address(REALVIEW_GIC_CPU_BASE));
#ifdef CONFIG_REALVIEW_MPCORE
gic_dist_init(1, __io_address(REALVIEW_GIC1_DIST_BASE), 64);
gic_cpu_init(1, __io_address(REALVIEW_GIC1_CPU_BASE));
gic_cascade_irq(1, IRQ_EB_IRQ1);
#endif
}
static void __init realview_eb_init(void)

8
arch/arm/mm/proc-v6.S
View file

@ -14,10 +14,13 @@
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/elf.h>
#include <asm/hardware/arm_scu.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pgtable.h>
#ifdef CONFIG_SMP
#include <asm/hardware/arm_scu.h>
#endif
#include "proc-macros.S"
#define D_CACHE_LINE_SIZE 32
@ -187,8 +190,7 @@ __v6_setup:
/* Set up the SCU on core 0 only */
mrc p15, 0, r0, c0, c0, 5 @ CPU core number
ands r0, r0, #15
moveq r0, #0x10000000 @ SCU_BASE
orreq r0, r0, #0x00100000
ldreq r0, =SCU_BASE
ldreq r5, [r0, #SCU_CTRL]
orreq r5, r5, #1
streq r5, [r0, #SCU_CTRL]

2
include/asm-arm/arch-realview/hardware.h
View file

@ -26,7 +26,7 @@
#include <asm/arch/platform.h>
/* macro to get at IO space when running virtually */
#define IO_ADDRESS(x) (((x) & 0x0fffffff) + (((x) >> 4) & 0x0f000000) + 0xf0000000)
#define IO_ADDRESS(x) ((((x) & 0x0effffff) | (((x) >> 4) & 0x0f000000)) + 0xf0000000)
#define __io_address(n) __io(IO_ADDRESS(n))
#endif

5
include/asm-arm/arch-realview/irqs.h
View file

@ -78,6 +78,9 @@
#define IRQ_PMU_SCU6 (IRQ_GIC_START + INT_PMU_SCU6)
#define IRQ_PMU_SCU7 (IRQ_GIC_START + INT_PMU_SCU7)
#define IRQ_EB_IRQ1 (IRQ_GIC_START + INT_EB_IRQ1)
#define IRQ_EB_IRQ2 (IRQ_GIC_START + INT_EB_IRQ2)
#define IRQMASK_WDOGINT INTMASK_WDOGINT
#define IRQMASK_SOFTINT INTMASK_SOFTINT
#define IRQMASK_COMMRx INTMASK_COMMRx
@ -115,4 +118,4 @@
#define IRQMASK_ETH INTMASK_ETH
#define IRQMASK_USB INTMASK_USB
#define NR_IRQS (IRQ_GIC_START + 64)
#define NR_IRQS (IRQ_GIC_START + 96)

16
include/asm-arm/arch-realview/platform.h
View file

@ -207,11 +207,23 @@
#define REALVIEW_GIC_CPU_BASE 0x10040000 /* Generic interrupt controller CPU interface */
#define REALVIEW_GIC_DIST_BASE 0x10041000 /* Generic interrupt controller distributor */
#else
#ifdef CONFIG_REALVIEW_MPCORE_REVB
#define REALVIEW_MPCORE_SCU_BASE 0x10100000 /* SCU registers */
#define REALVIEW_GIC_CPU_BASE 0x10100100 /* Generic interrupt controller CPU interface */
#define REALVIEW_TWD_BASE 0x10100700
#define REALVIEW_TWD_SIZE 0x00000100
#define REALVIEW_GIC_DIST_BASE 0x10101000 /* Generic interrupt controller distributor */
#define REALVIEW_MPCORE_SYS_PLD_CTRL1 0xD8 /* Register offset for MPCore sysctl */
#else
#define REALVIEW_MPCORE_SCU_BASE 0x1F000000 /* SCU registers */
#define REALVIEW_GIC_CPU_BASE 0x1F000100 /* Generic interrupt controller CPU interface */
#define REALVIEW_TWD_BASE 0x1F000700
#define REALVIEW_TWD_SIZE 0x00000100
#define REALVIEW_GIC_DIST_BASE 0x1F001000 /* Generic interrupt controller distributor */
#define REALVIEW_MPCORE_SYS_PLD_CTRL1 0x74 /* Register offset for MPCore sysctl */
#endif
#define REALVIEW_GIC1_CPU_BASE 0x10040000 /* Generic interrupt controller CPU interface */
#define REALVIEW_GIC1_DIST_BASE 0x10041000 /* Generic interrupt controller distributor */
#endif
#define REALVIEW_SMC_BASE 0x10080000 /* SMC */
/* Reserved 0x10090000 - 0x100EFFFF */
@ -306,7 +318,11 @@
#define INT_USB 29 /* USB controller */
#define INT_TSPENINT 30 /* Touchscreen pen */
#define INT_TSKPADINT 31 /* Touchscreen keypad */
#else
#define MAX_GIC_NR 2
#define INT_AACI 0
#define INT_TIMERINT0_1 1
#define INT_TIMERINT2_3 2

8
include/asm-arm/arch-realview/scu.h Normal file
View file

@ -0,0 +1,8 @@
#ifndef __ASMARM_ARCH_SCU_H
#define __ASMARM_ARCH_SCU_H
#include <asm/arch/platform.h>
#define SCU_BASE REALVIEW_MPCORE_SCU_BASE
#endif

2
include/asm-arm/hardware/arm_scu.h
View file

@ -1,6 +1,8 @@
#ifndef ASMARM_HARDWARE_ARM_SCU_H
#define ASMARM_HARDWARE_ARM_SCU_H
#include <asm/arch/scu.h>
/*
* SCU registers
*/

5
include/asm-arm/hardware/gic.h
View file

@ -33,8 +33,9 @@
#define GIC_DIST_SOFTINT 0xf00
#ifndef __ASSEMBLY__
void gic_dist_init(void __iomem *base);
void gic_cpu_init(void __iomem *base);
void gic_dist_init(unsigned int gic_nr, void __iomem *base, unsigned int irq_start);
void gic_cpu_init(unsigned int gic_nr, void __iomem *base);
void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
void gic_raise_softirq(cpumask_t cpumask, unsigned int irq);
#endif