diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/shared/pci/detect_raven_bridge.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/shared/pci/detect_raven_bridge.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/shared/pci/detect_raven_bridge.c b/c/src/lib/libbsp/powerpc/shared/pci/detect_raven_bridge.c index 249aaa390f..feff4d1c0f 100644 --- a/c/src/lib/libbsp/powerpc/shared/pci/detect_raven_bridge.c +++ b/c/src/lib/libbsp/powerpc/shared/pci/detect_raven_bridge.c @@ -3,6 +3,7 @@ */ #include <libcpu/io.h> +#include <libcpu/spr.h> #include <bsp.h> #include <bsp/pci.h> @@ -12,6 +13,8 @@ #include <rtems/bspIo.h> +SPR_RW(HID0) + #define RAVEN_MPIC_IOSPACE_ENABLE 0x1 #define RAVEN_MPIC_MEMSPACE_ENABLE 0x2 #define RAVEN_MASTER_ENABLE 0x4 @@ -19,11 +22,43 @@ #define RAVEN_SYSTEM_ERROR_ENABLE 0x100 #define RAVEN_CLEAR_EVENTS_MASK 0xf9000000 +#define RAVEN_MPIC_MEREN 0xfeff0020 +#define RAVEN_MPIC_MERST 0xfeff0024 +/* enable machine check on all conditions + * EXCEPT for signalled master abort (which + * can be caused by PCI configuration space + * accesses to non-present devices) + * - of course, this is sort of a hack :-( + */ +#define MEREN_VAL 0x2d00 + #define pci BSP_pci_configuration extern const pci_config_access_functions pci_direct_functions; extern const pci_config_access_functions pci_indirect_functions; +unsigned long +_BSP_clear_hostbridge_errors(int enableMCP, int quiet) +{ +unsigned merst; + + merst = in_be32(RAVEN_MPIC_MERST); + /* write back value to clear status */ + out_be32(RAVEN_MPIC_MERST, merst); + + if (enableMCP) { + if (!quiet) + printk("Enabling MCP generation on hostbridge errors\n"); + out_be32(RAVEN_MPIC_MEREN, MEREN_VAL); + _write_HID0(_read_HID0() | HID0_EMCP ); + } else { + if ( !quiet && enableMCP ) { + printk("leaving MCP interrupt disabled\n"); + } + } + return (merst & 0xffff); +} + void detect_host_bridge() { PPC_DEVICE *hostbridge; |