diff options
author | Christian Krafft <krafft@de.ibm.com> | 2008-07-15 19:51:44 (GMT) |
---|---|---|
committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-22 00:39:31 (GMT) |
commit | 70694a8bab22bd0cc98ff4ee5cc75fe9be30fcd0 (patch) | |
tree | 9dab5e6d7d17deda385f21cafb7035857d1db38c /arch/powerpc/platforms/cell/ras.c | |
parent | 880e710580c09bf86cddac687fc492a8318934fe (diff) | |
download | linux-fsl-qoriq-70694a8bab22bd0cc98ff4ee5cc75fe9be30fcd0.tar.xz |
powerpc/cell: Cleanup sysreset_hack for IBM cell blades
This patch adds a config option for the sysreset_hack used for
IBM Cell blades. The code is moves from pervasive.c into ras.c and
gets it's own init method.
Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/ras.c')
-rw-r--r-- | arch/powerpc/platforms/cell/ras.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/ras.c b/arch/powerpc/platforms/cell/ras.c index 505f9b9..2a14b05 100644 --- a/arch/powerpc/platforms/cell/ras.c +++ b/arch/powerpc/platforms/cell/ras.c @@ -236,6 +236,52 @@ 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; |