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irqchip: mips-gic: Stop using per-platform mapping tables 

Now that the GIC properly uses IRQ domains, kill off the per-platform
routing tables that were used to make the GIC appear transparent.

This includes:
 - removing the mapping tables and the support for applying them,
 - moving GIC IPI support to the GIC driver,
 - properly routing the i8259 through the GIC on Malta, and
 - updating IRQ assignments on SEAD-3 when the GIC is present.

Platforms no longer will pass an interrupt mapping table to gic_init.
Instead, they will pass the CPU interrupt vector (2 - 7) that they
expect the GIC to route interrupts to.  Note that in EIC mode this
value is ignored and all GIC interrupts are routed to EIC vector 1.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Reviewed-by: Qais Yousef <qais.yousef@imgtec.com>
Tested-by: Qais Yousef <qais.yousef@imgtec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jeffrey Deans <jeffrey.deans@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: John Crispin <blogic@openwrt.org>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7816/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Andrew Bresticker 2014-09-18 14:47:24 -07:00 коммит произвёл Ralf Baechle
Родитель c49581a4df
Коммит 18743d2781
10 изменённых файлов: 202 добавлений и 329 удалений
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35
arch/mips/include/asm/gic.h
Просмотреть файл

@ -316,31 +316,6 @@
GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_MAP_TO_VPE_REG_OFF(intr, vpe)), \ GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_MAP_TO_VPE_REG_OFF(intr, vpe)), \
GIC_SH_MAP_TO_VPE_REG_BIT(vpe)) GIC_SH_MAP_TO_VPE_REG_BIT(vpe))
/*
* Interrupt Meta-data specification. The ipiflag helps
* in building ipi_map.
*/
struct gic_intr_map {
unsigned int cpunum; /* Directed to this CPU */
#define GIC_UNUSED 0xdead /* Dummy data */
unsigned int pin; /* Directed to this Pin */
unsigned int polarity; /* Polarity : +/- */
unsigned int trigtype; /* Trigger : Edge/Levl */
unsigned int flags; /* Misc flags */
#define GIC_FLAG_TRANSPARENT 0x01
};
/*
* This is only used in EIC mode. This helps to figure out which
* shared interrupts we need to process when we get a vector interrupt.
*/
#define GIC_MAX_SHARED_INTR 0x5
struct gic_shared_intr_map {
unsigned int num_shared_intr;
unsigned int intr_list[GIC_MAX_SHARED_INTR];
unsigned int local_intr_mask;
};
/* GIC nomenclature for Core Interrupt Pins. */ /* GIC nomenclature for Core Interrupt Pins. */
#define GIC_CPU_INT0 0 /* Core Interrupt 2 */ #define GIC_CPU_INT0 0 /* Core Interrupt 2 */
#define GIC_CPU_INT1 1 /* . */ #define GIC_CPU_INT1 1 /* . */
@ -349,6 +324,9 @@ struct gic_shared_intr_map {
#define GIC_CPU_INT4 4 /* . */ #define GIC_CPU_INT4 4 /* . */
#define GIC_CPU_INT5 5 /* Core Interrupt 7 */ #define GIC_CPU_INT5 5 /* Core Interrupt 7 */
/* Add 2 to convert GIC CPU pin to core interrupt */
#define GIC_CPU_PIN_OFFSET 2
/* Local GIC interrupts. */ /* Local GIC interrupts. */
#define GIC_INT_TMR (GIC_CPU_INT5) #define GIC_INT_TMR (GIC_CPU_INT5)
#define GIC_INT_PERFCTR (GIC_CPU_INT5) #define GIC_INT_PERFCTR (GIC_CPU_INT5)
@ -365,13 +343,12 @@ struct gic_shared_intr_map {
extern unsigned int gic_present; extern unsigned int gic_present;
extern unsigned int gic_frequency; extern unsigned int gic_frequency;
extern unsigned long _gic_base; extern unsigned long _gic_base;
extern unsigned int gic_irq_base;
extern unsigned int gic_irq_flags[]; extern unsigned int gic_irq_flags[];
extern struct gic_shared_intr_map gic_shared_intr_map[]; extern unsigned int gic_cpu_pin;
extern void gic_init(unsigned long gic_base_addr, extern void gic_init(unsigned long gic_base_addr,
unsigned long gic_addrspace_size, struct gic_intr_map *intrmap, unsigned long gic_addrspace_size, unsigned int cpu_vec,
unsigned int intrmap_size, unsigned int irqbase); unsigned int irqbase);
extern void gic_clocksource_init(unsigned int); extern void gic_clocksource_init(unsigned int);
extern unsigned int gic_compare_int (void); extern unsigned int gic_compare_int (void);
extern cycle_t gic_read_count(void); extern cycle_t gic_read_count(void);

14
arch/mips/include/asm/mips-boards/maltaint.h
Просмотреть файл

@ -20,11 +20,10 @@
#define MIPSCPU_INT_SW1 1 #define MIPSCPU_INT_SW1 1
#define MIPSCPU_INT_MB0 2 #define MIPSCPU_INT_MB0 2
#define MIPSCPU_INT_I8259A MIPSCPU_INT_MB0 #define MIPSCPU_INT_I8259A MIPSCPU_INT_MB0
#define MIPSCPU_INT_GIC MIPSCPU_INT_MB0 /* GIC chained interrupt */
#define MIPSCPU_INT_MB1 3 #define MIPSCPU_INT_MB1 3
#define MIPSCPU_INT_SMI MIPSCPU_INT_MB1 #define MIPSCPU_INT_SMI MIPSCPU_INT_MB1
#define MIPSCPU_INT_IPI0 MIPSCPU_INT_MB1 /* GIC IPI */
#define MIPSCPU_INT_MB2 4 #define MIPSCPU_INT_MB2 4
#define MIPSCPU_INT_IPI1 MIPSCPU_INT_MB2 /* GIC IPI */
#define MIPSCPU_INT_MB3 5 #define MIPSCPU_INT_MB3 5
#define MIPSCPU_INT_COREHI MIPSCPU_INT_MB3 #define MIPSCPU_INT_COREHI MIPSCPU_INT_MB3
#define MIPSCPU_INT_MB4 6 #define MIPSCPU_INT_MB4 6
@ -61,14 +60,7 @@
#define MSC01E_INT_PERFCTR 10 #define MSC01E_INT_PERFCTR 10
#define MSC01E_INT_CPUCTR 11 #define MSC01E_INT_CPUCTR 11
/* External Interrupts used for IPI */ /* GIC external interrupts */
#define GIC_IPI_EXT_INTR_RESCHED_VPE0 16 #define GIC_INT_I8259A 3
#define GIC_IPI_EXT_INTR_CALLFNC_VPE0 17
#define GIC_IPI_EXT_INTR_RESCHED_VPE1 18
#define GIC_IPI_EXT_INTR_CALLFNC_VPE1 19
#define GIC_IPI_EXT_INTR_RESCHED_VPE2 20
#define GIC_IPI_EXT_INTR_CALLFNC_VPE2 21
#define GIC_IPI_EXT_INTR_RESCHED_VPE3 22
#define GIC_IPI_EXT_INTR_CALLFNC_VPE3 23
#endif /* !(_MIPS_MALTAINT_H) */ #endif /* !(_MIPS_MALTAINT_H) */

13
arch/mips/include/asm/mips-boards/sead3int.h
Просмотреть файл

@ -14,4 +14,17 @@
#define GIC_BASE_ADDR 0x1b1c0000 #define GIC_BASE_ADDR 0x1b1c0000
#define GIC_ADDRSPACE_SZ (128 * 1024) #define GIC_ADDRSPACE_SZ (128 * 1024)
/* CPU interrupt offsets */
#define CPU_INT_GIC 2
#define CPU_INT_EHCI 2
#define CPU_INT_UART0 4
#define CPU_INT_UART1 4
#define CPU_INT_NET 6
/* GIC interrupt offsets */
#define GIC_INT_NET 0
#define GIC_INT_UART1 2
#define GIC_INT_UART0 3
#define GIC_INT_EHCI 5
#endif /* !(_MIPS_SEAD3INT_H) */ #endif /* !(_MIPS_SEAD3INT_H) */

3
arch/mips/kernel/cevt-gic.c
Просмотреть файл

@ -91,7 +91,8 @@ int gic_clockevent_init(void)
clockevents_register_device(cd); clockevents_register_device(cd);
GICWRITE(GIC_REG(VPE_LOCAL, GIC_VPE_COMPARE_MAP), 0x80000002); GICWRITE(GIC_REG(VPE_LOCAL, GIC_VPE_COMPARE_MAP),
GIC_MAP_TO_PIN_MSK | gic_cpu_pin);
GICWRITE(GIC_REG(VPE_LOCAL, GIC_VPE_SMASK), GIC_VPE_SMASK_CMP_MSK); GICWRITE(GIC_REG(VPE_LOCAL, GIC_VPE_SMASK), GIC_VPE_SMASK_CMP_MSK);
if (gic_timer_irq_installed) if (gic_timer_irq_installed)

189
arch/mips/mti-malta/malta-int.c
Просмотреть файл

@ -38,14 +38,9 @@
#include <asm/rtlx.h> #include <asm/rtlx.h>
static unsigned long _msc01_biu_base; static unsigned long _msc01_biu_base;
static unsigned int ipi_map[NR_CPUS];
static DEFINE_RAW_SPINLOCK(mips_irq_lock); static DEFINE_RAW_SPINLOCK(mips_irq_lock);
#ifdef CONFIG_MIPS_GIC_IPI
DECLARE_BITMAP(ipi_ints, GIC_NUM_INTRS);
#endif
static inline int mips_pcibios_iack(void) static inline int mips_pcibios_iack(void)
{ {
int irq; int irq;
@ -127,24 +122,10 @@ static void malta_hw0_irqdispatch(void)
#endif #endif
} }
static void malta_ipi_irqdispatch(void) static irqreturn_t i8259_handler(int irq, void *dev_id)
{ {
#ifdef CONFIG_MIPS_GIC_IPI malta_hw0_irqdispatch();
unsigned long irq; return IRQ_HANDLED;
DECLARE_BITMAP(pending, GIC_NUM_INTRS);
gic_get_int_mask(pending, ipi_ints);
irq = find_first_bit(pending, GIC_NUM_INTRS);
while (irq < GIC_NUM_INTRS) {
do_IRQ(MIPS_GIC_IRQ_BASE + irq);
irq = find_next_bit(pending, GIC_NUM_INTRS, irq + 1);
}
#endif
if (gic_compare_int())
do_IRQ(MIPS_GIC_IRQ_BASE);
} }
static void corehi_irqdispatch(void) static void corehi_irqdispatch(void)
@ -203,6 +184,12 @@ static void corehi_irqdispatch(void)
die("CoreHi interrupt", regs); die("CoreHi interrupt", regs);
} }
static irqreturn_t corehi_handler(int irq, void *dev_id)
{
corehi_irqdispatch();
return IRQ_HANDLED;
}
static inline int clz(unsigned long x) static inline int clz(unsigned long x)
{ {
__asm__( __asm__(
@ -286,10 +273,9 @@ asmlinkage void plat_irq_dispatch(void)
irq = irq_ffs(pending); irq = irq_ffs(pending);
if (irq == MIPSCPU_INT_I8259A) /* HACK: GIC doesn't properly dispatch local interrupts yet */
malta_hw0_irqdispatch(); if (gic_present && irq == MIPSCPU_INT_GIC && gic_compare_int())
else if (gic_present && ((1 << irq) & ipi_map[smp_processor_id()])) do_IRQ(MIPS_GIC_IRQ_BASE);
malta_ipi_irqdispatch();
else else
do_IRQ(MIPS_CPU_IRQ_BASE + irq); do_IRQ(MIPS_CPU_IRQ_BASE + irq);
} }
@ -312,13 +298,6 @@ static void ipi_call_dispatch(void)
do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ); do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ);
} }
#endif /* CONFIG_MIPS_MT_SMP */
#ifdef CONFIG_MIPS_GIC_IPI
#define GIC_MIPS_CPU_IPI_RESCHED_IRQ 3
#define GIC_MIPS_CPU_IPI_CALL_IRQ 4
static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id) static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
{ {
#ifdef CONFIG_MIPS_VPE_APSP_API_CMP #ifdef CONFIG_MIPS_VPE_APSP_API_CMP
@ -349,31 +328,16 @@ static struct irqaction irq_call = {
.flags = IRQF_PERCPU, .flags = IRQF_PERCPU,
.name = "IPI_call" .name = "IPI_call"
}; };
#endif /* CONFIG_MIPS_GIC_IPI */ #endif /* CONFIG_MIPS_MT_SMP */
static int gic_resched_int_base;
static int gic_call_int_base;
#define GIC_RESCHED_INT(cpu) (gic_resched_int_base+(cpu))
#define GIC_CALL_INT(cpu) (gic_call_int_base+(cpu))
unsigned int plat_ipi_call_int_xlate(unsigned int cpu)
{
return GIC_CALL_INT(cpu);
}
unsigned int plat_ipi_resched_int_xlate(unsigned int cpu)
{
return GIC_RESCHED_INT(cpu);
}
static struct irqaction i8259irq = { static struct irqaction i8259irq = {
.handler = no_action, .handler = i8259_handler,
.name = "XT-PIC cascade", .name = "XT-PIC cascade",
.flags = IRQF_NO_THREAD, .flags = IRQF_NO_THREAD,
}; };
static struct irqaction corehi_irqaction = { static struct irqaction corehi_irqaction = {
.handler = no_action, .handler = corehi_handler,
.name = "CoreHi", .name = "CoreHi",
.flags = IRQF_NO_THREAD, .flags = IRQF_NO_THREAD,
}; };
@ -399,60 +363,6 @@ static msc_irqmap_t msc_eicirqmap[] __initdata = {
static int msc_nr_eicirqs __initdata = ARRAY_SIZE(msc_eicirqmap); static int msc_nr_eicirqs __initdata = ARRAY_SIZE(msc_eicirqmap);
/*
* This GIC specific tabular array defines the association between External
* Interrupts and CPUs/Core Interrupts. The nature of the External
* Interrupts is also defined here - polarity/trigger.
*/
#define GIC_CPU_NMI GIC_MAP_TO_NMI_MSK
#define X GIC_UNUSED
static struct gic_intr_map gic_intr_map[GIC_NUM_INTRS] = {
{ X, X, X, X, 0 },
{ X, X, X, X, 0 },
{ X, X, X, X, 0 },
{ 0, GIC_CPU_INT0, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT4, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ X, X, X, X, 0 },
{ X, X, X, X, 0 },
{ 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_NMI, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_NMI, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ X, X, X, X, 0 },
/* The remainder of this table is initialised by fill_ipi_map */
};
#undef X
#ifdef CONFIG_MIPS_GIC_IPI
static void __init fill_ipi_map1(int baseintr, int cpu, int cpupin)
{
int intr = baseintr + cpu;
gic_intr_map[intr].cpunum = cpu;
gic_intr_map[intr].pin = cpupin;
gic_intr_map[intr].polarity = GIC_POL_POS;
gic_intr_map[intr].trigtype = GIC_TRIG_EDGE;
gic_intr_map[intr].flags = 0;
ipi_map[cpu] |= (1 << (cpupin + 2));
bitmap_set(ipi_ints, intr, 1);
}
static void __init fill_ipi_map(void)
{
int cpu;
for (cpu = 0; cpu < nr_cpu_ids; cpu++) {
fill_ipi_map1(gic_resched_int_base, cpu, GIC_CPU_INT1);
fill_ipi_map1(gic_call_int_base, cpu, GIC_CPU_INT2);
}
}
#endif
void __init arch_init_ipiirq(int irq, struct irqaction *action) void __init arch_init_ipiirq(int irq, struct irqaction *action)
{ {
setup_irq(irq, action); setup_irq(irq, action);
@ -461,6 +371,8 @@ void __init arch_init_ipiirq(int irq, struct irqaction *action)
void __init arch_init_irq(void) void __init arch_init_irq(void)
{ {
int corehi_irq, i8259_irq;
init_i8259_irqs(); init_i8259_irqs();
if (!cpu_has_veic) if (!cpu_has_veic)
@ -507,34 +419,11 @@ void __init arch_init_irq(void)
msc_nr_irqs); msc_nr_irqs);
} }
if (cpu_has_veic) {
set_vi_handler(MSC01E_INT_I8259A, malta_hw0_irqdispatch);
set_vi_handler(MSC01E_INT_COREHI, corehi_irqdispatch);
setup_irq(MSC01E_INT_BASE+MSC01E_INT_I8259A, &i8259irq);
setup_irq(MSC01E_INT_BASE+MSC01E_INT_COREHI, &corehi_irqaction);
} else if (cpu_has_vint) {
set_vi_handler(MIPSCPU_INT_I8259A, malta_hw0_irqdispatch);
set_vi_handler(MIPSCPU_INT_COREHI, corehi_irqdispatch);
setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq);
setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI,
&corehi_irqaction);
} else {
setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq);
setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI,
&corehi_irqaction);
}
if (gic_present) { if (gic_present) {
/* FIXME */
int i; int i;
#if defined(CONFIG_MIPS_GIC_IPI)
gic_call_int_base = GIC_NUM_INTRS - gic_init(GIC_BASE_ADDR, GIC_ADDRSPACE_SZ, MIPSCPU_INT_GIC,
(NR_CPUS - nr_cpu_ids) * 2 - nr_cpu_ids; MIPS_GIC_IRQ_BASE);
gic_resched_int_base = gic_call_int_base - nr_cpu_ids;
fill_ipi_map();
#endif
gic_init(GIC_BASE_ADDR, GIC_ADDRSPACE_SZ, gic_intr_map,
ARRAY_SIZE(gic_intr_map), MIPS_GIC_IRQ_BASE);
if (!mips_cm_present()) { if (!mips_cm_present()) {
/* Enable the GIC */ /* Enable the GIC */
i = REG(_msc01_biu_base, MSC01_SC_CFG); i = REG(_msc01_biu_base, MSC01_SC_CFG);
@ -542,28 +431,8 @@ void __init arch_init_irq(void)
(i | (0x1 << MSC01_SC_CFG_GICENA_SHF)); (i | (0x1 << MSC01_SC_CFG_GICENA_SHF));
pr_debug("GIC Enabled\n"); pr_debug("GIC Enabled\n");
} }
#if defined(CONFIG_MIPS_GIC_IPI) i8259_irq = MIPS_GIC_IRQ_BASE + GIC_INT_I8259A;
/* set up ipi interrupts */ corehi_irq = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_COREHI;
if (cpu_has_vint) {
set_vi_handler(MIPSCPU_INT_IPI0, malta_ipi_irqdispatch);
set_vi_handler(MIPSCPU_INT_IPI1, malta_ipi_irqdispatch);
}
/* Argh.. this really needs sorting out.. */
pr_info("CPU%d: status register was %08x\n",
smp_processor_id(), read_c0_status());
write_c0_status(read_c0_status() | STATUSF_IP3 | STATUSF_IP4);
pr_info("CPU%d: status register now %08x\n",
smp_processor_id(), read_c0_status());
write_c0_status(0x1100dc00);
pr_info("CPU%d: status register frc %08x\n",
smp_processor_id(), read_c0_status());
for (i = 0; i < nr_cpu_ids; i++) {
arch_init_ipiirq(MIPS_GIC_IRQ_BASE +
GIC_RESCHED_INT(i), &irq_resched);
arch_init_ipiirq(MIPS_GIC_IRQ_BASE +
GIC_CALL_INT(i), &irq_call);
}
#endif
} else { } else {
#if defined(CONFIG_MIPS_MT_SMP) #if defined(CONFIG_MIPS_MT_SMP)
/* set up ipi interrupts */ /* set up ipi interrupts */
@ -587,7 +456,21 @@ void __init arch_init_irq(void)
arch_init_ipiirq(cpu_ipi_resched_irq, &irq_resched); arch_init_ipiirq(cpu_ipi_resched_irq, &irq_resched);
arch_init_ipiirq(cpu_ipi_call_irq, &irq_call); arch_init_ipiirq(cpu_ipi_call_irq, &irq_call);
#endif #endif
if (cpu_has_veic) {
set_vi_handler(MSC01E_INT_I8259A,
malta_hw0_irqdispatch);
set_vi_handler(MSC01E_INT_COREHI,
corehi_irqdispatch);
i8259_irq = MSC01E_INT_BASE + MSC01E_INT_I8259A;
corehi_irq = MSC01E_INT_BASE + MSC01E_INT_COREHI;
} else {
i8259_irq = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_I8259A;
corehi_irq = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_COREHI;
}
} }
setup_irq(i8259_irq, &i8259irq);
setup_irq(corehi_irq, &corehi_irqaction);
} }
void malta_be_init(void) void malta_be_init(void)

8
arch/mips/mti-sead3/sead3-ehci.c
Просмотреть файл

@ -10,6 +10,9 @@
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <asm/gic.h>
#include <asm/mips-boards/sead3int.h>
struct resource ehci_resources[] = { struct resource ehci_resources[] = {
{ {
.start = 0x1b200000, .start = 0x1b200000,
@ -17,7 +20,6 @@ struct resource ehci_resources[] = {
.flags = IORESOURCE_MEM .flags = IORESOURCE_MEM
}, },
{ {
.start = MIPS_CPU_IRQ_BASE + 2,
.flags = IORESOURCE_IRQ .flags = IORESOURCE_IRQ
} }
}; };
@ -37,6 +39,10 @@ static struct platform_device ehci_device = {
static int __init ehci_init(void) static int __init ehci_init(void)
{ {
if (gic_present)
ehci_resources[1].start = MIPS_GIC_IRQ_BASE + GIC_INT_EHCI;
else
ehci_resources[1].start = MIPS_CPU_IRQ_BASE + CPU_INT_EHCI;
return platform_device_register(&ehci_device); return platform_device_register(&ehci_device);
} }

28
arch/mips/mti-sead3/sead3-int.c
Просмотреть файл

@ -22,30 +22,6 @@
static unsigned long sead3_config_reg; static unsigned long sead3_config_reg;
/*
* This table defines the setup for each external GIC interrupt. It is
* indexed by interrupt number.
*/
#define GIC_CPU_NMI GIC_MAP_TO_NMI_MSK
static struct gic_intr_map gic_intr_map[GIC_NUM_INTRS] = {
{ 0, GIC_CPU_INT4, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT0, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT0, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT0, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ 0, GIC_CPU_INT0, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
{ GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED },
{ GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED },
{ GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED },
{ GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED },
{ GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED },
{ GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED },
{ GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED, GIC_UNUSED },
};
asmlinkage void plat_irq_dispatch(void) asmlinkage void plat_irq_dispatch(void)
{ {
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
@ -81,7 +57,7 @@ void __init arch_init_irq(void)
(current_cpu_data.options & MIPS_CPU_VEIC) ? "on" : "off"); (current_cpu_data.options & MIPS_CPU_VEIC) ? "on" : "off");
if (gic_present) if (gic_present)
gic_init(GIC_BASE_ADDR, GIC_ADDRSPACE_SZ, gic_intr_map, gic_init(GIC_BASE_ADDR, GIC_ADDRSPACE_SZ, CPU_INT_GIC,
ARRAY_SIZE(gic_intr_map), MIPS_GIC_IRQ_BASE); MIPS_GIC_IRQ_BASE);
} }

14
arch/mips/mti-sead3/sead3-net.c
Просмотреть файл

@ -10,6 +10,9 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/smsc911x.h> #include <linux/smsc911x.h>
#include <asm/gic.h>
#include <asm/mips-boards/sead3int.h>
static struct smsc911x_platform_config sead3_smsc911x_data = { static struct smsc911x_platform_config sead3_smsc911x_data = {
.irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW, .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
.irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL, .irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL,
@ -17,14 +20,13 @@ static struct smsc911x_platform_config sead3_smsc911x_data = {
.phy_interface = PHY_INTERFACE_MODE_MII, .phy_interface = PHY_INTERFACE_MODE_MII,
}; };
struct resource sead3_net_resourcess[] = { struct resource sead3_net_resources[] = {
{ {
.start = 0x1f010000, .start = 0x1f010000,
.end = 0x1f01ffff, .end = 0x1f01ffff,
.flags = IORESOURCE_MEM .flags = IORESOURCE_MEM
}, },
{ {
.start = MIPS_CPU_IRQ_BASE + 6,
.flags = IORESOURCE_IRQ .flags = IORESOURCE_IRQ
} }
}; };
@ -35,12 +37,16 @@ static struct platform_device sead3_net_device = {
.dev = { .dev = {
.platform_data = &sead3_smsc911x_data, .platform_data = &sead3_smsc911x_data,
}, },
.num_resources = ARRAY_SIZE(sead3_net_resourcess), .num_resources = ARRAY_SIZE(sead3_net_resources),
.resource = sead3_net_resourcess .resource = sead3_net_resources
}; };
static int __init sead3_net_init(void) static int __init sead3_net_init(void)
{ {
if (gic_present)
sead3_net_resources[1].start = MIPS_GIC_IRQ_BASE + GIC_INT_NET;
else
sead3_net_resources[1].start = MIPS_CPU_IRQ_BASE + CPU_INT_NET;
return platform_device_register(&sead3_net_device); return platform_device_register(&sead3_net_device);
} }

18
arch/mips/mti-sead3/sead3-platform.c
Просмотреть файл

@ -9,10 +9,13 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/serial_8250.h> #include <linux/serial_8250.h>
#define UART(base, int) \ #include <asm/gic.h>
#include <asm/mips-boards/sead3int.h>
#define UART(base) \
{ \ { \
.mapbase = base, \ .mapbase = base, \
.irq = int, \ .irq = -1, \
.uartclk = 14745600, \ .uartclk = 14745600, \
.iotype = UPIO_MEM32, \ .iotype = UPIO_MEM32, \
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP, \ .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP, \
@ -20,8 +23,8 @@
} }
static struct plat_serial8250_port uart8250_data[] = { static struct plat_serial8250_port uart8250_data[] = {
UART(0x1f000900, MIPS_CPU_IRQ_BASE + 4), /* ttyS0 = USB */ UART(0x1f000900), /* ttyS0 = USB */
UART(0x1f000800, MIPS_CPU_IRQ_BASE + 4), /* ttyS1 = RS232 */ UART(0x1f000800), /* ttyS1 = RS232 */
{ }, { },
}; };
@ -35,6 +38,13 @@ static struct platform_device uart8250_device = {
static int __init uart8250_init(void) static int __init uart8250_init(void)
{ {
if (gic_present) {
uart8250_data[0].irq = MIPS_GIC_IRQ_BASE + GIC_INT_UART0;
uart8250_data[1].irq = MIPS_GIC_IRQ_BASE + GIC_INT_UART1;
} else {
uart8250_data[0].irq = MIPS_CPU_IRQ_BASE + CPU_INT_UART0;
uart8250_data[1].irq = MIPS_CPU_IRQ_BASE + CPU_INT_UART1;
}
return platform_device_register(&uart8250_device); return platform_device_register(&uart8250_device);
} }

209
drivers/irqchip/irq-mips-gic.c
Просмотреть файл

@ -8,6 +8,8 @@
*/ */
#include <linux/bitmap.h> #include <linux/bitmap.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/smp.h> #include <linux/smp.h>
#include <linux/irq.h> #include <linux/irq.h>
#include <linux/clocksource.h> #include <linux/clocksource.h>
@ -22,11 +24,8 @@
unsigned int gic_frequency; unsigned int gic_frequency;
unsigned int gic_present; unsigned int gic_present;
unsigned long _gic_base; unsigned long _gic_base;
unsigned int gic_irq_base;
unsigned int gic_irq_flags[GIC_NUM_INTRS]; unsigned int gic_irq_flags[GIC_NUM_INTRS];
unsigned int gic_cpu_pin;
/* The index into this array is the vector # of the interrupt. */
struct gic_shared_intr_map gic_shared_intr_map[GIC_NUM_INTRS];
struct gic_pcpu_mask { struct gic_pcpu_mask {
DECLARE_BITMAP(pcpu_mask, GIC_NUM_INTRS); DECLARE_BITMAP(pcpu_mask, GIC_NUM_INTRS);
@ -46,6 +45,8 @@ static struct gic_intrmask_regs intrmask_regs[NR_CPUS];
static DEFINE_SPINLOCK(gic_lock); static DEFINE_SPINLOCK(gic_lock);
static struct irq_domain *gic_irq_domain; static struct irq_domain *gic_irq_domain;
static void __gic_irq_dispatch(void);
#if defined(CONFIG_CSRC_GIC) || defined(CONFIG_CEVT_GIC) #if defined(CONFIG_CSRC_GIC) || defined(CONFIG_CEVT_GIC)
cycle_t gic_read_count(void) cycle_t gic_read_count(void)
{ {
@ -117,21 +118,6 @@ void gic_send_ipi(unsigned int intr)
GICWRITE(GIC_REG(SHARED, GIC_SH_WEDGE), 0x80000000 | intr); GICWRITE(GIC_REG(SHARED, GIC_SH_WEDGE), 0x80000000 | intr);
} }
static void gic_eic_irq_dispatch(void)
{
unsigned int cause = read_c0_cause();
int irq;
irq = (cause & ST0_IM) >> STATUSB_IP2;
if (irq == 0)
irq = -1;
if (irq >= 0)
do_IRQ(gic_irq_base + irq);
else
spurious_interrupt();
}
static void __init vpe_local_setup(unsigned int numvpes) static void __init vpe_local_setup(unsigned int numvpes)
{ {
unsigned long timer_intr = GIC_INT_TMR; unsigned long timer_intr = GIC_INT_TMR;
@ -166,16 +152,15 @@ static void __init vpe_local_setup(unsigned int numvpes)
GIC_MAP_TO_PIN_MSK | timer_intr); GIC_MAP_TO_PIN_MSK | timer_intr);
if (cpu_has_veic) { if (cpu_has_veic) {
set_vi_handler(timer_intr + GIC_PIN_TO_VEC_OFFSET, set_vi_handler(timer_intr + GIC_PIN_TO_VEC_OFFSET,
gic_eic_irq_dispatch); __gic_irq_dispatch);
gic_shared_intr_map[timer_intr + GIC_PIN_TO_VEC_OFFSET].local_intr_mask |= GIC_VPE_RMASK_TIMER_MSK;
} }
if (vpe_ctl & GIC_VPE_CTL_PERFCNT_RTBL_MSK) if (vpe_ctl & GIC_VPE_CTL_PERFCNT_RTBL_MSK)
GICWRITE(GIC_REG(VPE_OTHER, GIC_VPE_PERFCTR_MAP), GICWRITE(GIC_REG(VPE_OTHER, GIC_VPE_PERFCTR_MAP),
GIC_MAP_TO_PIN_MSK | perf_intr); GIC_MAP_TO_PIN_MSK | perf_intr);
if (cpu_has_veic) { if (cpu_has_veic) {
set_vi_handler(perf_intr + GIC_PIN_TO_VEC_OFFSET, gic_eic_irq_dispatch); set_vi_handler(perf_intr + GIC_PIN_TO_VEC_OFFSET,
gic_shared_intr_map[perf_intr + GIC_PIN_TO_VEC_OFFSET].local_intr_mask |= GIC_VPE_RMASK_PERFCNT_MSK; __gic_irq_dispatch);
} }
} }
} }
@ -343,64 +328,100 @@ static struct irq_chip gic_irq_controller = {
#endif #endif
}; };
static void __init gic_setup_intr(unsigned int intr, unsigned int cpu, static void __gic_irq_dispatch(void)
unsigned int pin, unsigned int polarity, unsigned int trigtype,
unsigned int flags)
{ {
struct gic_shared_intr_map *map_ptr; unsigned int intr, virq;
while ((intr = gic_get_int()) != GIC_NUM_INTRS) {
virq = irq_linear_revmap(gic_irq_domain, intr);
do_IRQ(virq);
}
}
static void gic_irq_dispatch(unsigned int irq, struct irq_desc *desc)
{
__gic_irq_dispatch();
}
#ifdef CONFIG_MIPS_GIC_IPI
static int gic_resched_int_base;
static int gic_call_int_base;
unsigned int plat_ipi_resched_int_xlate(unsigned int cpu)
{
return gic_resched_int_base + cpu;
}
unsigned int plat_ipi_call_int_xlate(unsigned int cpu)
{
return gic_call_int_base + cpu;
}
static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
{
scheduler_ipi();
return IRQ_HANDLED;
}
static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
{
smp_call_function_interrupt();
return IRQ_HANDLED;
}
static struct irqaction irq_resched = {
.handler = ipi_resched_interrupt,
.flags = IRQF_PERCPU,
.name = "IPI resched"
};
static struct irqaction irq_call = {
.handler = ipi_call_interrupt,
.flags = IRQF_PERCPU,
.name = "IPI call"
};
static __init void gic_ipi_init_one(unsigned int intr, int cpu,
struct irqaction *action)
{
int virq = irq_create_mapping(gic_irq_domain, intr);
int i; int i;
/* Setup Intr to Pin mapping */ GIC_SH_MAP_TO_VPE_SMASK(intr, cpu);
if (pin & GIC_MAP_TO_NMI_MSK) {
int i;
GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_MAP_TO_PIN(intr)), pin);
/* FIXME: hack to route NMI to all cpu's */
for (i = 0; i < NR_CPUS; i += 32) {
GICWRITE(GIC_REG_ADDR(SHARED,
GIC_SH_MAP_TO_VPE_REG_OFF(intr, i)),
0xffffffff);
}
} else {
GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_MAP_TO_PIN(intr)),
GIC_MAP_TO_PIN_MSK | pin);
/* Setup Intr to CPU mapping */
GIC_SH_MAP_TO_VPE_SMASK(intr, cpu);
if (cpu_has_veic) {
set_vi_handler(pin + GIC_PIN_TO_VEC_OFFSET,
gic_eic_irq_dispatch);
map_ptr = &gic_shared_intr_map[pin + GIC_PIN_TO_VEC_OFFSET];
if (map_ptr->num_shared_intr >= GIC_MAX_SHARED_INTR)
BUG();
map_ptr->intr_list[map_ptr->num_shared_intr++] = intr;
}
}
/* Setup Intr Polarity */
GIC_SET_POLARITY(intr, polarity);
/* Setup Intr Trigger Type */
GIC_SET_TRIGGER(intr, trigtype);
/* Init Intr Masks */
GIC_CLR_INTR_MASK(intr);
/* Initialise per-cpu Interrupt software masks */
for (i = 0; i < NR_CPUS; i++) for (i = 0; i < NR_CPUS; i++)
clear_bit(intr, pcpu_masks[i].pcpu_mask); clear_bit(intr, pcpu_masks[i].pcpu_mask);
set_bit(intr, pcpu_masks[cpu].pcpu_mask); set_bit(intr, pcpu_masks[cpu].pcpu_mask);
if ((flags & GIC_FLAG_TRANSPARENT) && (cpu_has_veic == 0)) irq_set_irq_type(virq, IRQ_TYPE_EDGE_RISING);
GIC_SET_INTR_MASK(intr);
if (trigtype == GIC_TRIG_EDGE) irq_set_handler(virq, handle_percpu_irq);
gic_irq_flags[intr] |= GIC_TRIG_EDGE; setup_irq(virq, action);
} }
static void __init gic_basic_init(int numintrs, int numvpes, static __init void gic_ipi_init(void)
struct gic_intr_map *intrmap, int mapsize)
{ {
unsigned int i, cpu; int i;
unsigned int pin_offset = 0;
/* Use last 2 * NR_CPUS interrupts as IPIs */
gic_resched_int_base = GIC_NUM_INTRS - nr_cpu_ids;
gic_call_int_base = gic_resched_int_base - nr_cpu_ids;
for (i = 0; i < nr_cpu_ids; i++) {
gic_ipi_init_one(gic_call_int_base + i, i, &irq_call);
gic_ipi_init_one(gic_resched_int_base + i, i, &irq_resched);
}
}
#else
static inline void gic_ipi_init(void)
{
}
#endif
static void __init gic_basic_init(int numintrs, int numvpes)
{
unsigned int i;
board_bind_eic_interrupt = &gic_bind_eic_interrupt; board_bind_eic_interrupt = &gic_bind_eic_interrupt;
@ -409,31 +430,8 @@ static void __init gic_basic_init(int numintrs, int numvpes,
GIC_SET_POLARITY(i, GIC_POL_POS); GIC_SET_POLARITY(i, GIC_POL_POS);
GIC_SET_TRIGGER(i, GIC_TRIG_LEVEL); GIC_SET_TRIGGER(i, GIC_TRIG_LEVEL);
GIC_CLR_INTR_MASK(i); GIC_CLR_INTR_MASK(i);
if (i < GIC_NUM_INTRS) { if (i < GIC_NUM_INTRS)
gic_irq_flags[i] = 0; gic_irq_flags[i] = 0;
gic_shared_intr_map[i].num_shared_intr = 0;
gic_shared_intr_map[i].local_intr_mask = 0;
}
}
/*
* In EIC mode, the HW_INT# is offset by (2-1). Need to subtract
* one because the GIC will add one (since 0=no intr).
*/
if (cpu_has_veic)
pin_offset = (GIC_CPU_TO_VEC_OFFSET - GIC_PIN_TO_VEC_OFFSET);
/* Setup specifics */
for (i = 0; i < mapsize; i++) {
cpu = intrmap[i].cpunum;
if (cpu == GIC_UNUSED)
continue;
gic_setup_intr(i,
intrmap[i].cpunum,
intrmap[i].pin + pin_offset,
intrmap[i].polarity,
intrmap[i].trigtype,
intrmap[i].flags);
} }
vpe_local_setup(numvpes); vpe_local_setup(numvpes);
@ -448,7 +446,7 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq,
spin_lock_irqsave(&gic_lock, flags); spin_lock_irqsave(&gic_lock, flags);
GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_MAP_TO_PIN(hw)), GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_MAP_TO_PIN(hw)),
GIC_MAP_TO_PIN_MSK | 0); GIC_MAP_TO_PIN_MSK | gic_cpu_pin);
/* Map to VPE 0 by default */ /* Map to VPE 0 by default */
GIC_SH_MAP_TO_VPE_SMASK(hw, 0); GIC_SH_MAP_TO_VPE_SMASK(hw, 0);
set_bit(hw, pcpu_masks[0].pcpu_mask); set_bit(hw, pcpu_masks[0].pcpu_mask);
@ -463,8 +461,7 @@ static struct irq_domain_ops gic_irq_domain_ops = {
}; };
void __init gic_init(unsigned long gic_base_addr, void __init gic_init(unsigned long gic_base_addr,
unsigned long gic_addrspace_size, unsigned long gic_addrspace_size, unsigned int cpu_vec,
struct gic_intr_map *intr_map, unsigned int intr_map_size,
unsigned int irqbase) unsigned int irqbase)
{ {
unsigned int gicconfig; unsigned int gicconfig;
@ -472,7 +469,6 @@ void __init gic_init(unsigned long gic_base_addr,
_gic_base = (unsigned long) ioremap_nocache(gic_base_addr, _gic_base = (unsigned long) ioremap_nocache(gic_base_addr,
gic_addrspace_size); gic_addrspace_size);
gic_irq_base = irqbase;
GICREAD(GIC_REG(SHARED, GIC_SH_CONFIG), gicconfig); GICREAD(GIC_REG(SHARED, GIC_SH_CONFIG), gicconfig);
numintrs = (gicconfig & GIC_SH_CONFIG_NUMINTRS_MSK) >> numintrs = (gicconfig & GIC_SH_CONFIG_NUMINTRS_MSK) >>
@ -483,10 +479,23 @@ void __init gic_init(unsigned long gic_base_addr,
GIC_SH_CONFIG_NUMVPES_SHF; GIC_SH_CONFIG_NUMVPES_SHF;
numvpes = numvpes + 1; numvpes = numvpes + 1;
if (cpu_has_veic) {
/* Always use vector 1 in EIC mode */
gic_cpu_pin = 0;
set_vi_handler(gic_cpu_pin + GIC_PIN_TO_VEC_OFFSET,
__gic_irq_dispatch);
} else {
gic_cpu_pin = cpu_vec - GIC_CPU_PIN_OFFSET;
irq_set_chained_handler(MIPS_CPU_IRQ_BASE + cpu_vec,
gic_irq_dispatch);
}
gic_irq_domain = irq_domain_add_simple(NULL, GIC_NUM_INTRS, irqbase, gic_irq_domain = irq_domain_add_simple(NULL, GIC_NUM_INTRS, irqbase,
&gic_irq_domain_ops, NULL); &gic_irq_domain_ops, NULL);
if (!gic_irq_domain) if (!gic_irq_domain)
panic("Failed to add GIC IRQ domain"); panic("Failed to add GIC IRQ domain");
gic_basic_init(numintrs, numvpes, intr_map, intr_map_size); gic_basic_init(numintrs, numvpes);
gic_ipi_init();
} }