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-rw-r--r--arch/powerpc/platforms/cell/interrupt.c116
-rw-r--r--arch/powerpc/platforms/cell/interrupt.h2
-rw-r--r--arch/powerpc/platforms/cell/spider-pic.c106
3 files changed, 169 insertions, 55 deletions
diff --git a/arch/powerpc/platforms/cell/interrupt.c b/arch/powerpc/platforms/cell/interrupt.c
index 63aa52acf441..9d41e07b0c95 100644
--- a/arch/powerpc/platforms/cell/interrupt.c
+++ b/arch/powerpc/platforms/cell/interrupt.c
@@ -123,7 +123,7 @@ static int iic_external_get_irq(struct iic_pending_bits pending)
pending.class != 2)
break;
irq = IIC_EXT_OFFSET
- + spider_get_irq(pending.prio + node * IIC_NODE_STRIDE)
+ + spider_get_irq(node)
+ node * IIC_NODE_STRIDE;
break;
case 0x01 ... 0x04:
@@ -174,38 +174,102 @@ int iic_get_irq(struct pt_regs *regs)
return irq;
}
-static int setup_iic(int cpu, struct iic *iic)
+/* hardcoded part to be compatible with older firmware */
+
+static int setup_iic_hardcoded(void)
{
struct device_node *np;
- int nodeid = cpu / 2;
+ int nodeid, cpu;
unsigned long regs;
+ struct iic *iic;
- for (np = of_find_node_by_type(NULL, "cpu");
- np;
- np = of_find_node_by_type(np, "cpu")) {
- if (nodeid == *(int *)get_property(np, "node-id", NULL))
- break;
+ for_each_cpu(cpu) {
+ iic = &per_cpu(iic, cpu);
+ nodeid = cpu/2;
+
+ for (np = of_find_node_by_type(NULL, "cpu");
+ np;
+ np = of_find_node_by_type(np, "cpu")) {
+ if (nodeid == *(int *)get_property(np, "node-id", NULL))
+ break;
+ }
+
+ if (!np) {
+ printk(KERN_WARNING "IIC: CPU %d not found\n", cpu);
+ iic->regs = NULL;
+ iic->target_id = 0xff;
+ return -ENODEV;
+ }
+
+ regs = *(long *)get_property(np, "iic", NULL);
+
+ /* hack until we have decided on the devtree info */
+ regs += 0x400;
+ if (cpu & 1)
+ regs += 0x20;
+
+ printk(KERN_INFO "IIC for CPU %d at %lx\n", cpu, regs);
+ iic->regs = __ioremap(regs, sizeof(struct iic_regs),
+ _PAGE_NO_CACHE);
+
+ iic->target_id = (nodeid << 4) + ((cpu & 1) ? 0xf : 0xe);
}
- if (!np) {
- printk(KERN_WARNING "IIC: CPU %d not found\n", cpu);
- iic->regs = NULL;
- iic->target_id = 0xff;
- return -ENODEV;
- }
+ return 0;
+}
- regs = *(long *)get_property(np, "iic", NULL);
+static int setup_iic(void)
+{
+ struct device_node *dn;
+ unsigned long *regs;
+ char *compatible;
+ unsigned *np, found = 0;
+ struct iic *iic = NULL;
+
+ for (dn = NULL; (dn = of_find_node_by_name(dn, "interrupt-controller"));) {
+ compatible = (char *)get_property(dn, "compatible", NULL);
+
+ if (!compatible) {
+ printk(KERN_WARNING "no compatible property found !\n");
+ continue;
+ }
- /* hack until we have decided on the devtree info */
- regs += 0x400;
- if (cpu & 1)
- regs += 0x20;
+ if (strstr(compatible, "IBM,CBEA-Internal-Interrupt-Controller"))
+ regs = (unsigned long *)get_property(dn,"reg", NULL);
+ else
+ continue;
- printk(KERN_DEBUG "IIC for CPU %d at %lx\n", cpu, regs);
- iic->regs = __ioremap(regs, sizeof(struct iic_regs),
- _PAGE_NO_CACHE);
- iic->target_id = (nodeid << 4) + ((cpu & 1) ? 0xf : 0xe);
- return 0;
+ if (!regs)
+ printk(KERN_WARNING "IIC: no reg property\n");
+
+ np = (unsigned int *)get_property(dn, "ibm,interrupt-server-ranges", NULL);
+
+ if (!np) {
+ printk(KERN_WARNING "IIC: CPU association not found\n");
+ iic->regs = NULL;
+ iic->target_id = 0xff;
+ return -ENODEV;
+ }
+
+ iic = &per_cpu(iic, np[0]);
+ iic->regs = __ioremap(regs[0], sizeof(struct iic_regs),
+ _PAGE_NO_CACHE);
+ iic->target_id = ((np[0] & 2) << 3) + ((np[0] & 1) ? 0xf : 0xe);
+ printk("IIC for CPU %d at %lx mapped to %p\n", np[0], regs[0], iic->regs);
+
+ iic = &per_cpu(iic, np[1]);
+ iic->regs = __ioremap(regs[2], sizeof(struct iic_regs),
+ _PAGE_NO_CACHE);
+ iic->target_id = ((np[1] & 2) << 3) + ((np[1] & 1) ? 0xf : 0xe);
+ printk("IIC for CPU %d at %lx mapped to %p\n", np[1], regs[2], iic->regs);
+
+ found++;
+ }
+
+ if (found)
+ return 0;
+ else
+ return -ENODEV;
}
#ifdef CONFIG_SMP
@@ -283,10 +347,12 @@ void iic_init_IRQ(void)
int cpu, irq_offset;
struct iic *iic;
+ if (setup_iic() < 0)
+ setup_iic_hardcoded();
+
irq_offset = 0;
for_each_cpu(cpu) {
iic = &per_cpu(iic, cpu);
- setup_iic(cpu, iic);
if (iic->regs)
out_be64(&iic->regs->prio, 0xff);
}
diff --git a/arch/powerpc/platforms/cell/interrupt.h b/arch/powerpc/platforms/cell/interrupt.h
index a14bd38791c0..799f77d98f96 100644
--- a/arch/powerpc/platforms/cell/interrupt.h
+++ b/arch/powerpc/platforms/cell/interrupt.h
@@ -57,7 +57,7 @@ extern void iic_local_disable(void);
extern u8 iic_get_target_id(int cpu);
extern void spider_init_IRQ(void);
-extern int spider_get_irq(unsigned long int_pending);
+extern int spider_get_irq(int node);
#endif
#endif /* ASM_CELL_PIC_H */
diff --git a/arch/powerpc/platforms/cell/spider-pic.c b/arch/powerpc/platforms/cell/spider-pic.c
index e74132188bdf..0e9bb0b72c50 100644
--- a/arch/powerpc/platforms/cell/spider-pic.c
+++ b/arch/powerpc/platforms/cell/spider-pic.c
@@ -84,10 +84,11 @@ static void __iomem *spider_get_irq_config(int irq)
static void spider_enable_irq(unsigned int irq)
{
+ int nodeid = (irq / IIC_NODE_STRIDE) * 0x10;
void __iomem *cfg = spider_get_irq_config(irq);
irq = spider_get_nr(irq);
- out_be32(cfg, in_be32(cfg) | 0x3107000eu);
+ out_be32(cfg, in_be32(cfg) | 0x3107000eu | nodeid);
out_be32(cfg + 4, in_be32(cfg + 4) | 0x00020000u | irq);
}
@@ -131,61 +132,108 @@ static struct hw_interrupt_type spider_pic = {
.end = spider_end_irq,
};
-
-int spider_get_irq(unsigned long int_pending)
+int spider_get_irq(int node)
{
- void __iomem *regs = spider_get_pic(int_pending);
unsigned long cs;
- int irq;
-
- cs = in_be32(regs + TIR_CS);
+ void __iomem *regs = spider_pics[node];
- irq = cs >> 24;
- if (irq != 63)
- return irq;
+ cs = in_be32(regs + TIR_CS) >> 24;
- return -1;
+ if (cs == 63)
+ return -1;
+ else
+ return cs;
}
-
-void spider_init_IRQ(void)
+
+/* hardcoded part to be compatible with older firmware */
+
+void spider_init_IRQ_hardcoded(void)
{
int node;
- struct device_node *dn;
- unsigned int *property;
long spiderpic;
+ long pics[] = { 0x24000008000, 0x34000008000 };
int n;
-/* FIXME: detect multiple PICs as soon as the device tree has them */
- for (node = 0; node < 1; node++) {
- dn = of_find_node_by_path("/");
- n = prom_n_addr_cells(dn);
- property = (unsigned int *) get_property(dn,
- "platform-spider-pic", NULL);
+ pr_debug("%s(%d): Using hardcoded defaults\n", __FUNCTION__, __LINE__);
- if (!property)
- continue;
- for (spiderpic = 0; n > 0; --n)
- spiderpic = (spiderpic << 32) + *property++;
+ for (node = 0; node < num_present_cpus()/2; node++) {
+ spiderpic = pics[node];
printk(KERN_DEBUG "SPIDER addr: %lx\n", spiderpic);
spider_pics[node] = __ioremap(spiderpic, 0x800, _PAGE_NO_CACHE);
for (n = 0; n < IIC_NUM_EXT; n++) {
int irq = n + IIC_EXT_OFFSET + node * IIC_NODE_STRIDE;
get_irq_desc(irq)->handler = &spider_pic;
+ }
/* do not mask any interrupts because of level */
out_be32(spider_pics[node] + TIR_MSK, 0x0);
-
+
/* disable edge detection clear */
/* out_be32(spider_pics[node] + TIR_EDC, 0x0); */
-
+
/* enable interrupt packets to be output */
out_be32(spider_pics[node] + TIR_PIEN,
in_be32(spider_pics[node] + TIR_PIEN) | 0x1);
-
+
/* Enable the interrupt detection enable bit. Do this last! */
out_be32(spider_pics[node] + TIR_DEN,
- in_be32(spider_pics[node] +TIR_DEN) | 0x1);
+ in_be32(spider_pics[node] + TIR_DEN) | 0x1);
+ }
+}
+
+void spider_init_IRQ(void)
+{
+ long spider_reg;
+ struct device_node *dn;
+ char *compatible;
+ int n, node = 0;
+
+ for (dn = NULL; (dn = of_find_node_by_name(dn, "interrupt-controller"));) {
+ compatible = (char *)get_property(dn, "compatible", NULL);
+ if (!compatible)
+ continue;
+
+ if (strstr(compatible, "CBEA,platform-spider-pic"))
+ spider_reg = *(long *)get_property(dn,"reg", NULL);
+ else if (strstr(compatible, "sti,platform-spider-pic")) {
+ spider_init_IRQ_hardcoded();
+ return;
+ } else
+ continue;
+
+ if (!spider_reg)
+ printk("interrupt controller does not have reg property !\n");
+
+ n = prom_n_addr_cells(dn);
+
+ if ( n != 2)
+ printk("reg property with invalid number of elements \n");
+
+ spider_pics[node] = __ioremap(spider_reg, 0x800, _PAGE_NO_CACHE);
+
+ printk("SPIDER addr: %lx with %i addr_cells mapped to %p\n",
+ spider_reg, n, spider_pics[node]);
+
+ for (n = 0; n < IIC_NUM_EXT; n++) {
+ int irq = n + IIC_EXT_OFFSET + node * IIC_NODE_STRIDE;
+ get_irq_desc(irq)->handler = &spider_pic;
}
+
+ /* do not mask any interrupts because of level */
+ out_be32(spider_pics[node] + TIR_MSK, 0x0);
+
+ /* disable edge detection clear */
+ /* out_be32(spider_pics[node] + TIR_EDC, 0x0); */
+
+ /* enable interrupt packets to be output */
+ out_be32(spider_pics[node] + TIR_PIEN,
+ in_be32(spider_pics[node] + TIR_PIEN) | 0x1);
+
+ /* Enable the interrupt detection enable bit. Do this last! */
+ out_be32(spider_pics[node] + TIR_DEN,
+ in_be32(spider_pics[node] + TIR_DEN) | 0x1);
+
+ node++;
}
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.