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2003-06-13 Till Straumann <strauman@slac.stanford.edu>

Browse Source 
PR 415/bsps
	* include/bsp.h, pci/detect_raven_bridge.c, startup/bspstart.c:
	Support enabling MCP exceptions on the host bridge. This can
	be used for memory probing on the VME bus.
This commit is contained in:
Joel Sherrill
2003-06-13 13:41:05 +00:00
parent c5c21225f4
commit 14ec2d48d2
4 changed files with 60 additions and 0 deletions
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7
c/src/lib/libbsp/powerpc/shared/ChangeLog
View File

@@ -1,3 +1,10 @@
2003-06-13 Till Straumann <strauman@slac.stanford.edu>
PR 415/bsps
* include/bsp.h, pci/detect_raven_bridge.c, startup/bspstart.c:
Support enabling MCP exceptions on the host bridge. This can
be used for memory probing on the VME bus.
2003-04-15 Joel Sherrill <joel@OARcorp.com>
PR 386/bsps

15
c/src/lib/libbsp/powerpc/shared/include/bsp.h
View File

@@ -91,6 +91,21 @@ extern void rtemsReboot(void);
extern int BSP_disconnect_clock_handler (void);
extern int BSP_connect_clock_handler (void);
/* clear hostbridge errors
*
* enableMCP: whether to enable MCP checkstop / machine check interrupts
* on the hostbridge and in HID0.
*
* NOTE: HID0 and MEREN are left alone if this flag is 0
*
* quiet : be silent
*
* RETURNS : raven MERST register contents (lowermost 16 bits), 0 if
* there were no errors
*/
extern unsigned long _BSP_clear_hostbridge_errors(int enableMCP, int quiet);
/*
* TM27 stuff
*/

35
c/src/lib/libbsp/powerpc/shared/pci/detect_raven_bridge.c
View File

@@ -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;

3
c/src/lib/libbsp/powerpc/shared/startup/bspstart.c
View File

@@ -323,6 +323,9 @@ void bsp_start( void )
BSP_time_base_divisor = (residualCopy.VitalProductData.TimeBaseDivisor?
residualCopy.VitalProductData.TimeBaseDivisor : 4000);
/* clear hostbridge errors and enable MCP */
_BSP_clear_hostbridge_errors(1/*enableMCP*/, 0/*quiet*/);
/* Allocate and set up the page table mappings
* This is only available on >604 CPUs.
*