diff options
Diffstat (limited to 'target/linux/pxcab/patches-2.6.30/0001-powerpc-mpic-Fix-mapping-of-DCR-based-MPIC-variants.patch')
| -rw-r--r-- | target/linux/pxcab/patches-2.6.30/0001-powerpc-mpic-Fix-mapping-of-DCR-based-MPIC-variants.patch | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/target/linux/pxcab/patches-2.6.30/0001-powerpc-mpic-Fix-mapping-of-DCR-based-MPIC-variants.patch b/target/linux/pxcab/patches-2.6.30/0001-powerpc-mpic-Fix-mapping-of-DCR-based-MPIC-variants.patch new file mode 100644 index 000000000..c54691927 --- /dev/null +++ b/target/linux/pxcab/patches-2.6.30/0001-powerpc-mpic-Fix-mapping-of-DCR-based-MPIC-variants.patch @@ -0,0 +1,107 @@ +commit 5a2642f620eb6e40792822fa0eafe23046fbb55e +Author: Benjamin Herrenschmidt <benh@kernel.crashing.org> +Date: Mon Jun 22 16:47:59 2009 +0000 + + powerpc/mpic: Fix mapping of "DCR" based MPIC variants + + Commit 31207dab7d2e63795eb15823947bd2f7025b08e2 + "Fix incorrect allocation of interrupt rev-map" + introduced a regression crashing on boot on machines using + a "DCR" based MPIC, such as the Cell blades. + + The reason is that the irq host data structure is initialized + much later as a result of that patch, causing our calls to + mpic_map() do be done before we have a host setup. + + Unfortunately, this breaks _mpic_map_dcr() which uses the + mpic->irqhost to get to the device node. + + This fixes it by, instead, passing the device node explicitely + to mpic_map(). + + Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> + Acked-by: Akira Tsukamoto <akirat@rd.scei.sony.co.jp> + +diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c +index 9c3af50..32a2e95 100644 +--- a/arch/powerpc/sysdev/mpic.c ++++ b/arch/powerpc/sysdev/mpic.c +@@ -279,28 +279,29 @@ static void _mpic_map_mmio(struct mpic *mpic, phys_addr_t phys_addr, + } + + #ifdef CONFIG_PPC_DCR +-static void _mpic_map_dcr(struct mpic *mpic, struct mpic_reg_bank *rb, ++static void _mpic_map_dcr(struct mpic *mpic, struct device_node *node, ++ struct mpic_reg_bank *rb, + unsigned int offset, unsigned int size) + { + const u32 *dbasep; + +- dbasep = of_get_property(mpic->irqhost->of_node, "dcr-reg", NULL); ++ dbasep = of_get_property(node, "dcr-reg", NULL); + +- rb->dhost = dcr_map(mpic->irqhost->of_node, *dbasep + offset, size); ++ rb->dhost = dcr_map(node, *dbasep + offset, size); + BUG_ON(!DCR_MAP_OK(rb->dhost)); + } + +-static inline void mpic_map(struct mpic *mpic, phys_addr_t phys_addr, +- struct mpic_reg_bank *rb, unsigned int offset, +- unsigned int size) ++static inline void mpic_map(struct mpic *mpic, struct device_node *node, ++ phys_addr_t phys_addr, struct mpic_reg_bank *rb, ++ unsigned int offset, unsigned int size) + { + if (mpic->flags & MPIC_USES_DCR) +- _mpic_map_dcr(mpic, rb, offset, size); ++ _mpic_map_dcr(mpic, node, rb, offset, size); + else + _mpic_map_mmio(mpic, phys_addr, rb, offset, size); + } + #else /* CONFIG_PPC_DCR */ +-#define mpic_map(m,p,b,o,s) _mpic_map_mmio(m,p,b,o,s) ++#define mpic_map(m,n,p,b,o,s) _mpic_map_mmio(m,p,b,o,s) + #endif /* !CONFIG_PPC_DCR */ + + +@@ -1152,8 +1153,8 @@ struct mpic * __init mpic_alloc(struct device_node *node, + } + + /* Map the global registers */ +- mpic_map(mpic, paddr, &mpic->gregs, MPIC_INFO(GREG_BASE), 0x1000); +- mpic_map(mpic, paddr, &mpic->tmregs, MPIC_INFO(TIMER_BASE), 0x1000); ++ mpic_map(mpic, node, paddr, &mpic->gregs, MPIC_INFO(GREG_BASE), 0x1000); ++ mpic_map(mpic, node, paddr, &mpic->tmregs, MPIC_INFO(TIMER_BASE), 0x1000); + + /* Reset */ + if (flags & MPIC_WANTS_RESET) { +@@ -1194,7 +1195,7 @@ struct mpic * __init mpic_alloc(struct device_node *node, + + /* Map the per-CPU registers */ + for (i = 0; i < mpic->num_cpus; i++) { +- mpic_map(mpic, paddr, &mpic->cpuregs[i], ++ mpic_map(mpic, node, paddr, &mpic->cpuregs[i], + MPIC_INFO(CPU_BASE) + i * MPIC_INFO(CPU_STRIDE), + 0x1000); + } +@@ -1202,7 +1203,7 @@ struct mpic * __init mpic_alloc(struct device_node *node, + /* Initialize main ISU if none provided */ + if (mpic->isu_size == 0) { + mpic->isu_size = mpic->num_sources; +- mpic_map(mpic, paddr, &mpic->isus[0], ++ mpic_map(mpic, node, paddr, &mpic->isus[0], + MPIC_INFO(IRQ_BASE), MPIC_INFO(IRQ_STRIDE) * mpic->isu_size); + } + mpic->isu_shift = 1 + __ilog2(mpic->isu_size - 1); +@@ -1256,8 +1257,10 @@ void __init mpic_assign_isu(struct mpic *mpic, unsigned int isu_num, + + BUG_ON(isu_num >= MPIC_MAX_ISU); + +- mpic_map(mpic, paddr, &mpic->isus[isu_num], 0, ++ mpic_map(mpic, mpic->irqhost->of_node, ++ paddr, &mpic->isus[isu_num], 0, + MPIC_INFO(IRQ_STRIDE) * mpic->isu_size); ++ + if ((isu_first + mpic->isu_size) > mpic->num_sources) + mpic->num_sources = isu_first + mpic->isu_size; + } |