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Diffstat (limited to 'arch/powerpc/sysdev/mpic.c')
-rw-r--r--arch/powerpc/sysdev/mpic.c53
1 files changed, 27 insertions, 26 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 74c64c0d3b7..893e65439e8 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -156,8 +156,7 @@ static inline u32 _mpic_read(enum mpic_reg_type type,
switch(type) {
#ifdef CONFIG_PPC_DCR
case mpic_access_dcr:
- return dcr_read(rb->dhost,
- rb->dbase + reg + rb->doff);
+ return dcr_read(rb->dhost, rb->dhost.base + reg);
#endif
case mpic_access_mmio_be:
return in_be32(rb->base + (reg >> 2));
@@ -174,8 +173,7 @@ static inline void _mpic_write(enum mpic_reg_type type,
switch(type) {
#ifdef CONFIG_PPC_DCR
case mpic_access_dcr:
- return dcr_write(rb->dhost,
- rb->dbase + reg + rb->doff, value);
+ return dcr_write(rb->dhost, rb->dhost.base + reg, value);
#endif
case mpic_access_mmio_be:
return out_be32(rb->base + (reg >> 2), value);
@@ -228,8 +226,13 @@ static inline u32 _mpic_irq_read(struct mpic *mpic, unsigned int src_no, unsigne
unsigned int isu = src_no >> mpic->isu_shift;
unsigned int idx = src_no & mpic->isu_mask;
- return _mpic_read(mpic->reg_type, &mpic->isus[isu],
- reg + (idx * MPIC_INFO(IRQ_STRIDE)));
+#ifdef CONFIG_MPIC_BROKEN_REGREAD
+ if (reg == 0)
+ return mpic->isu_reg0_shadow[idx];
+ else
+#endif
+ return _mpic_read(mpic->reg_type, &mpic->isus[isu],
+ reg + (idx * MPIC_INFO(IRQ_STRIDE)));
}
static inline void _mpic_irq_write(struct mpic *mpic, unsigned int src_no,
@@ -240,6 +243,11 @@ static inline void _mpic_irq_write(struct mpic *mpic, unsigned int src_no,
_mpic_write(mpic->reg_type, &mpic->isus[isu],
reg + (idx * MPIC_INFO(IRQ_STRIDE)), value);
+
+#ifdef CONFIG_MPIC_BROKEN_REGREAD
+ if (reg == 0)
+ mpic->isu_reg0_shadow[idx] = value;
+#endif
}
#define mpic_read(b,r) _mpic_read(mpic->reg_type,&(b),(r))
@@ -269,9 +277,11 @@ static void _mpic_map_mmio(struct mpic *mpic, unsigned long phys_addr,
static void _mpic_map_dcr(struct mpic *mpic, struct mpic_reg_bank *rb,
unsigned int offset, unsigned int size)
{
- rb->dbase = mpic->dcr_base;
- rb->doff = offset;
- rb->dhost = dcr_map(mpic->of_node, rb->dbase + rb->doff, size);
+ const u32 *dbasep;
+
+ dbasep = of_get_property(mpic->irqhost->of_node, "dcr-reg", NULL);
+
+ rb->dhost = dcr_map(mpic->irqhost->of_node, *dbasep + offset, size);
BUG_ON(!DCR_MAP_OK(rb->dhost));
}
@@ -758,7 +768,7 @@ static void mpic_end_ipi(unsigned int irq)
#endif /* CONFIG_SMP */
-static void mpic_set_affinity(unsigned int irq, cpumask_t cpumask)
+void mpic_set_affinity(unsigned int irq, cpumask_t cpumask)
{
struct mpic *mpic = mpic_from_irq(irq);
unsigned int src = mpic_irq_to_hw(irq);
@@ -861,10 +871,8 @@ static struct irq_chip mpic_irq_ht_chip = {
static int mpic_host_match(struct irq_host *h, struct device_node *node)
{
- struct mpic *mpic = h->host_data;
-
/* Exact match, unless mpic node is NULL */
- return mpic->of_node == NULL || mpic->of_node == node;
+ return h->of_node == NULL || h->of_node == node;
}
static int mpic_host_map(struct irq_host *h, unsigned int virq,
@@ -985,10 +993,9 @@ struct mpic * __init mpic_alloc(struct device_node *node,
memset(mpic, 0, sizeof(struct mpic));
mpic->name = name;
- mpic->of_node = of_node_get(node);
- mpic->irqhost = irq_alloc_host(IRQ_HOST_MAP_LINEAR, isu_size,
- &mpic_host_ops,
+ mpic->irqhost = irq_alloc_host(of_node_get(node), IRQ_HOST_MAP_LINEAR,
+ isu_size, &mpic_host_ops,
flags & MPIC_LARGE_VECTORS ? 2048 : 256);
if (mpic->irqhost == NULL) {
of_node_put(node);
@@ -1068,20 +1075,14 @@ struct mpic * __init mpic_alloc(struct device_node *node,
BUG_ON(paddr == 0 && node == NULL);
/* If no physical address passed in, check if it's dcr based */
- if (paddr == 0 && of_get_property(node, "dcr-reg", NULL) != NULL)
- mpic->flags |= MPIC_USES_DCR;
-
+ if (paddr == 0 && of_get_property(node, "dcr-reg", NULL) != NULL) {
#ifdef CONFIG_PPC_DCR
- if (mpic->flags & MPIC_USES_DCR) {
- const u32 *dbasep;
- dbasep = of_get_property(node, "dcr-reg", NULL);
- BUG_ON(dbasep == NULL);
- mpic->dcr_base = *dbasep;
+ mpic->flags |= MPIC_USES_DCR;
mpic->reg_type = mpic_access_dcr;
- }
#else
- BUG_ON (mpic->flags & MPIC_USES_DCR);
+ BUG();
#endif /* CONFIG_PPC_DCR */
+ }
/* If the MPIC is not DCR based, and no physical address was passed
* in, try to obtain one