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powerpc: Consolidate mpic_alloc() OF address translation

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Instead of using the open-coded "reg" property lookup and address
translation in mpic_alloc(), directly call of_address_to_resource().
This includes various workarounds for special cases which the naive
of_address_translate() does not.

Afterwards it is possible to remove the copiously copy-pasted calls to
of_address_translate() from the 85xx/86xx/powermac platforms.

Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Kyle Moffett
2011-12-02 06:27:59 +00:00
committed by Benjamin Herrenschmidt
parent 582d3e0994
commit 8bf4156896
20 changed files with 55 additions and 175 deletions
Download Patch File Download Diff File Expand all files Collapse all files

61
arch/powerpc/sysdev/mpic.c
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@@ -1142,7 +1142,24 @@ struct mpic * __init mpic_alloc(struct device_node *node,
const char *vers;
int i;
int intvec_top;
u64 paddr = phys_addr;
/*
* If no phyiscal address was specified then all of the phyiscal
* addressing parameters must come from the device-tree.
*/
if (!phys_addr) {
BUG_ON(!node);
/* Check if it is DCR-based */
if (of_get_property(node, "dcr-reg", NULL)) {
flags |= MPIC_USES_DCR;
} else {
struct resource r;
if (of_address_to_resource(node, 0, &r))
return NULL;
phys_addr = r.start;
}
}
mpic = kzalloc(sizeof(struct mpic), GFP_KERNEL);
if (mpic == NULL)
@@ -1224,35 +1241,25 @@ struct mpic * __init mpic_alloc(struct device_node *node,
#endif
/* default register type */
mpic->reg_type = (flags & MPIC_BIG_ENDIAN) ?
mpic_access_mmio_be : mpic_access_mmio_le;
if (flags & MPIC_BIG_ENDIAN)
mpic->reg_type = mpic_access_mmio_be;
else
mpic->reg_type = mpic_access_mmio_le;
/* If no physical address is passed in, a device-node is mandatory */
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) {
/*
* An MPIC with a "dcr-reg" property must be accessed that way, but
* only if the kernel includes DCR support.
*/
#ifdef CONFIG_PPC_DCR
mpic->flags |= MPIC_USES_DCR;
if (flags & MPIC_USES_DCR)
mpic->reg_type = mpic_access_dcr;
#else
BUG();
#endif /* CONFIG_PPC_DCR */
}
/* If the MPIC is not DCR based, and no physical address was passed
* in, try to obtain one
*/
if (paddr == 0 && !(mpic->flags & MPIC_USES_DCR)) {
const u32 *reg = of_get_property(node, "reg", NULL);
BUG_ON(reg == NULL);
paddr = of_translate_address(node, reg);
BUG_ON(paddr == OF_BAD_ADDR);
}
BUG_ON(flags & MPIC_USES_DCR);
#endif
/* Map the global registers */
mpic_map(mpic, node, paddr, &mpic->gregs, MPIC_INFO(GREG_BASE), 0x1000);
mpic_map(mpic, node, paddr, &mpic->tmregs, MPIC_INFO(TIMER_BASE), 0x1000);
mpic_map(mpic, node, phys_addr, &mpic->gregs, MPIC_INFO(GREG_BASE), 0x1000);
mpic_map(mpic, node, phys_addr, &mpic->tmregs, MPIC_INFO(TIMER_BASE), 0x1000);
/* Reset */
@@ -1307,7 +1314,7 @@ struct mpic * __init mpic_alloc(struct device_node *node,
for_each_possible_cpu(i) {
unsigned int cpu = get_hard_smp_processor_id(i);
mpic_map(mpic, node, paddr, &mpic->cpuregs[cpu],
mpic_map(mpic, node, phys_addr, &mpic->cpuregs[cpu],
MPIC_INFO(CPU_BASE) + cpu * MPIC_INFO(CPU_STRIDE),
0x1000);
}
@@ -1315,7 +1322,7 @@ 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, node, paddr, &mpic->isus[0],
mpic_map(mpic, node, phys_addr, &mpic->isus[0],
MPIC_INFO(IRQ_BASE), MPIC_INFO(IRQ_STRIDE) * mpic->isu_size);
}
mpic->isu_shift = 1 + __ilog2(mpic->isu_size - 1);
@@ -1347,7 +1354,7 @@ struct mpic * __init mpic_alloc(struct device_node *node,
}
printk(KERN_INFO "mpic: Setting up MPIC \"%s\" version %s at %llx,"
" max %d CPUs\n",
name, vers, (unsigned long long)paddr, num_possible_cpus());
name, vers, (unsigned long long)phys_addr, num_possible_cpus());
printk(KERN_INFO "mpic: ISU size: %d, shift: %d, mask: %x\n",
mpic->isu_size, mpic->isu_shift, mpic->isu_mask);