diff options
Diffstat (limited to 'arch/powerpc/platforms/cell/ras.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/ras.c | 68 |
1 files changed, 64 insertions, 4 deletions
diff --git a/arch/powerpc/platforms/cell/ras.c b/arch/powerpc/platforms/cell/ras.c index 655704ad03cf..2a14b052abcd 100644 --- a/arch/powerpc/platforms/cell/ras.c +++ b/arch/powerpc/platforms/cell/ras.c @@ -17,6 +17,7 @@ #include <asm/reg.h> #include <asm/io.h> #include <asm/prom.h> +#include <asm/kexec.h> #include <asm/machdep.h> #include <asm/rtas.h> #include <asm/cell-regs.h> @@ -226,10 +227,61 @@ static int cbe_ptcal_notify_reboot(struct notifier_block *nb, return cbe_ptcal_disable(); } +static void cbe_ptcal_crash_shutdown(void) +{ + cbe_ptcal_disable(); +} + static struct notifier_block cbe_ptcal_reboot_notifier = { .notifier_call = cbe_ptcal_notify_reboot }; +#ifdef CONFIG_PPC_IBM_CELL_RESETBUTTON +static int sysreset_hack; + +static int __init cbe_sysreset_init(void) +{ + struct cbe_pmd_regs __iomem *regs; + + sysreset_hack = machine_is_compatible("IBM,CBPLUS-1.0"); + if (!sysreset_hack) + return 0; + + regs = cbe_get_cpu_pmd_regs(0); + if (!regs) + return 0; + + /* Enable JTAG system-reset hack */ + out_be32(®s->fir_mode_reg, + in_be32(®s->fir_mode_reg) | + CBE_PMD_FIR_MODE_M8); + + return 0; +} +device_initcall(cbe_sysreset_init); + +int cbe_sysreset_hack(void) +{ + struct cbe_pmd_regs __iomem *regs; + + /* + * The BMC can inject user triggered system reset exceptions, + * but cannot set the system reset reason in srr1, + * so check an extra register here. + */ + if (sysreset_hack && (smp_processor_id() == 0)) { + regs = cbe_get_cpu_pmd_regs(0); + if (!regs) + return 0; + if (in_be64(®s->ras_esc_0) & 0x0000ffff) { + out_be64(®s->ras_esc_0, 0); + return 0; + } + } + return 1; +} +#endif /* CONFIG_PPC_IBM_CELL_RESETBUTTON */ + int __init cbe_ptcal_init(void) { int ret; @@ -241,12 +293,20 @@ int __init cbe_ptcal_init(void) return -ENODEV; ret = register_reboot_notifier(&cbe_ptcal_reboot_notifier); - if (ret) { - printk(KERN_ERR "Can't disable PTCAL, so not enabling\n"); - return ret; - } + if (ret) + goto out1; + + ret = crash_shutdown_register(&cbe_ptcal_crash_shutdown); + if (ret) + goto out2; return cbe_ptcal_enable(); + +out2: + unregister_reboot_notifier(&cbe_ptcal_reboot_notifier); +out1: + printk(KERN_ERR "Can't disable PTCAL, so not enabling\n"); + return ret; } arch_initcall(cbe_ptcal_init); |