diff options
Diffstat (limited to 'arch/powerpc/platforms/powernv/opal.c')
-rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 72 |
1 files changed, 50 insertions, 22 deletions
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index f10b9ec8c1f5..18fd4e71c9c1 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -208,7 +208,7 @@ static int __init opal_register_exception_handlers(void) * start catching/handling HMI directly in Linux. */ if (!opal_check_token(OPAL_HANDLE_HMI)) { - pr_info("opal: Old firmware detected, OPAL handles HMIs.\n"); + pr_info("Old firmware detected, OPAL handles HMIs.\n"); opal_register_exception_handler( OPAL_HYPERVISOR_MAINTENANCE_HANDLER, 0, glue); @@ -667,7 +667,13 @@ static void __init opal_dump_region_init(void) /* Register kernel log buffer */ addr = log_buf_addr_get(); + if (addr == NULL) + return; + size = log_buf_len_get(); + if (size == 0) + return; + rc = opal_register_dump_region(OPAL_DUMP_REGION_LOG_BUF, __pa(addr), size); /* Don't warn if this is just an older OPAL that doesn't @@ -695,15 +701,54 @@ static void opal_i2c_create_devs(void) of_platform_device_create(np, NULL, NULL); } +static void __init opal_irq_init(struct device_node *dn) +{ + const __be32 *irqs; + int i, irqlen; + + /* Get interrupt property */ + irqs = of_get_property(opal_node, "opal-interrupts", &irqlen); + opal_irq_count = irqs ? (irqlen / 4) : 0; + pr_debug("Found %d interrupts reserved for OPAL\n", opal_irq_count); + if (!opal_irq_count) + return; + + /* Install interrupt handlers */ + opal_irqs = kzalloc(opal_irq_count * sizeof(unsigned int), GFP_KERNEL); + for (i = 0; irqs && i < opal_irq_count; i++, irqs++) { + unsigned int irq, virq; + int rc; + + /* Get hardware and virtual IRQ */ + irq = be32_to_cpup(irqs); + virq = irq_create_mapping(NULL, irq); + if (virq == NO_IRQ) { + pr_warn("Failed to map irq 0x%x\n", irq); + continue; + } + + /* Install interrupt handler */ + rc = request_irq(virq, opal_interrupt, 0, "opal", NULL); + if (rc) { + irq_dispose_mapping(virq); + pr_warn("Error %d requesting irq %d (0x%x)\n", + rc, virq, irq); + continue; + } + + /* Cache IRQ */ + opal_irqs[i] = virq; + } +} + static int __init opal_init(void) { struct device_node *np, *consoles; - const __be32 *irqs; - int rc, i, irqlen; + int rc; opal_node = of_find_node_by_path("/ibm,opal"); if (!opal_node) { - pr_warn("opal: Node not found\n"); + pr_warn("Device node not found\n"); return -ENODEV; } @@ -725,24 +770,7 @@ static int __init opal_init(void) opal_i2c_create_devs(); /* Find all OPAL interrupts and request them */ - irqs = of_get_property(opal_node, "opal-interrupts", &irqlen); - pr_debug("opal: Found %d interrupts reserved for OPAL\n", - irqs ? (irqlen / 4) : 0); - opal_irq_count = irqlen / 4; - opal_irqs = kzalloc(opal_irq_count * sizeof(unsigned int), GFP_KERNEL); - for (i = 0; irqs && i < (irqlen / 4); i++, irqs++) { - unsigned int hwirq = be32_to_cpup(irqs); - unsigned int irq = irq_create_mapping(NULL, hwirq); - if (irq == NO_IRQ) { - pr_warning("opal: Failed to map irq 0x%x\n", hwirq); - continue; - } - rc = request_irq(irq, opal_interrupt, 0, "opal", NULL); - if (rc) - pr_warning("opal: Error %d requesting irq %d" - " (0x%x)\n", rc, irq, hwirq); - opal_irqs[i] = irq; - } + opal_irq_init(opal_node); /* Create "opal" kobject under /sys/firmware */ rc = opal_sysfs_init(); |