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linux-vax-kern-commit
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From: Andy P. <at...@us...> - 2001-06-26 18:59:04
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Update of /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel
In directory usw-pr-cvs1:/tmp/cvs-serv18447/kernel
Modified Files:
cpu_generic.c cpu_ka410.c cpu_ka42.c cpu_ka43.c cpu_ka46.c
cpu_ka55.c cpu_ka630.c cpu_ka640.c cpu_ka650.c cpu_ka660.c
entry.S interrupt.c interrupt.h reboot.c setup.c
Log Message:
machine check fixes. separate pgalloc.h routines into arch/vax/mm/pgalloc.c
Index: cpu_generic.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/cpu_generic.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- cpu_generic.c 2001/01/17 16:13:57 1.1
+++ cpu_generic.c 2001/06/26 18:59:00 1.2
@@ -11,6 +11,19 @@
* Stuff that is specific to a given CPU can be found in cpu_XXX.c
*/
+/*
+ * Generic reboot and halt functions are in reboot.c
+ * CPUs that need to do special stuff in their halt and reboot functions
+ * should point to their own functions in their machine vector,
+ * otherwise they can leave NULL in the machine vector slots for these
+ * functions
+ *
+ * atp. This holds for machine check functions too. Leave a NULL if you
+ * just want a halt instruction on receipt of a machine check.
+ * See VARM Chapter 5 for details on machine check frames.
+ */
+
+
#include <asm/dz11.h>
#include <asm/io.h> /* For ioremap() */
#include <asm/mtpr.h>
@@ -71,6 +84,7 @@
: "r2" );
}
+
int ka46_48_49_prom_getchar(void)
{
/* Not yet implemented */
@@ -102,6 +116,7 @@
only be used after VM is enabled and the DZ11 registers have been
mapped by map_dz11_regs(). */
+
/* This gets set to non-NULL once the I/O page has been mapped */
volatile struct dz11_regs *dz11_addr = NULL;
@@ -109,6 +124,7 @@
console. Normally it is line 3 */
static unsigned int dz11_line;
+
/* stuff a char out of a DZ11-compatible serial chip */
void dz11_putchar(int c)
{
@@ -148,6 +164,7 @@
while ( ((txcs = dz11_addr->csr ) & DZ11_CSR_TRDY) == 0) ;
}
+
int dz11_getchar(void)
{
/* Not yet implemented */
@@ -164,11 +181,5 @@
dz11_addr = ioremap(dz11_phys_addr, sizeof(*dz11_addr));
}
-
-/*
- * Generic reboot and halt functions. CPUs that need to do special stuff
- * here should point to their own functions in their machine vector,
- * otherwise they can leave NULL in the machine vector slots for these
- * functions
- */
+
Index: cpu_ka410.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/cpu_ka410.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- cpu_ka410.c 2001/01/17 16:13:57 1.1
+++ cpu_ka410.c 2001/06/26 18:59:00 1.2
@@ -38,6 +38,8 @@
NULL, /* reboot */
NULL, /* halt */
+
+ NULL, /* mcheck - machine check */
NULL, /* init_devices */
Index: cpu_ka42.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/cpu_ka42.c,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -r1.4 -r1.5
--- cpu_ka42.c 2001/02/22 22:36:42 1.4
+++ cpu_ka42.c 2001/06/26 18:59:00 1.5
@@ -43,6 +43,7 @@
NULL, /* reboot */
NULL, /* halt */
+ NULL, /* mcheck - machine check */
ka42_init_devices, /* init_devices */
Index: cpu_ka43.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/cpu_ka43.c,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -r1.5 -r1.6
--- cpu_ka43.c 2001/03/04 23:50:30 1.5
+++ cpu_ka43.c 2001/06/26 18:59:00 1.6
@@ -9,6 +9,7 @@
* 2000/04/01 Mattias Nordlund
* Fixed the cache initializing, added the functions
* ka43_cache_disbale/enable/clear and moved some stuff around.
+ * atp jun 2001 - machine check implementation
*/
#include <linux/types.h> /* For NULL */
@@ -28,6 +29,7 @@
void ka43_cache_disable(volatile unsigned int *creg_addr);
void ka43_cache_clear(volatile unsigned int *ctag_addr);
void ka43_cache_enable(volatile unsigned int *creg_addr);
+void ka43_mcheck(void *stkframe);
void ka43_init_devices(void);
@@ -35,6 +37,14 @@
/* Internal CPU register space */
static volatile struct ka43_cpu_regs *cpu_regs;
+/* We keep the cache page remaps handy incase we want to reset the cache
+ - see the machine check etc..
+ - perhaps we should bung this in the mv too.
+ atp jun 01
+ */
+static volatile unsigned int *ka43_ctag_addr;
+static volatile unsigned int *ka43_creg_addr;
+
struct ka43_machine_vector {
struct vax_mv mv;
@@ -56,7 +66,8 @@
NULL, /* reboot */
NULL, /* halt */
-
+ ka43_mcheck, /* mcheck - machine check */
+
ka43_init_devices,
ka43_cpu_type_str
@@ -73,18 +84,16 @@
mv_ka43.sidex = *(unsigned int *)RIGEL_SIDEX_ADDR;
}
+/* dont call ka43_cache_reset before this function (unlikely) */
void ka43_post_vm_init(void)
{
- volatile unsigned int *ctag_addr;
- volatile unsigned int *creg_addr;
-
init_dz11_console(0x200A0000, 3);
dz_serial_console_init(0, 0);
cpu_regs = ioremap(KA43_CPU_BASE, KA43_CPU_SIZE);
- creg_addr = ioremap(KA43_CH2_CREG, 1);
- ctag_addr = ioremap(KA43_CT2_BASE, KA43_CT2_SIZE);
+ ka43_creg_addr = ioremap(KA43_CH2_CREG, 1);
+ ka43_ctag_addr = ioremap(KA43_CT2_BASE, KA43_CT2_SIZE);
/* Disable parity on DMA and CPU memory accesses. Don't know what the
story is with this, but VMS seems do this too... */
@@ -93,13 +102,10 @@
/*
* Resetting the cache involves disabling it, then clear it and enable again.
*/
- ka43_cache_disable(creg_addr);
- ka43_cache_clear(ctag_addr);
- ka43_cache_enable(creg_addr);
-
- /* Don't need these mappings any more */
- iounmap((void *)ctag_addr);
- iounmap((void *)creg_addr);
+ ka43_cache_disable(ka43_creg_addr);
+ ka43_cache_clear(ka43_ctag_addr);
+ ka43_cache_enable(ka43_creg_addr);
+
}
void ka43_cache_disable(volatile unsigned int *creg_addr)
@@ -148,6 +154,16 @@
}
}
+void ka43_cache_reset(void)
+{
+ /*
+ * Resetting the cache involves disabling it, then clear it and enable again.
+ */
+ ka43_cache_disable(ka43_creg_addr);
+ ka43_cache_clear(ka43_ctag_addr);
+ ka43_cache_enable(ka43_creg_addr);
+}
+
void ka43_init_devices(void)
{
#ifdef CONFIG_VSBUS
@@ -161,4 +177,29 @@
return "KA43";
}
+/* if this seems very similar to the netbsd implementation, then
+ * it is. After all how many ways can you check a sequence of flags?
+ */
+void ka43_mcheck(void *stkframe)
+{
+ /* map the frame to the stack */
+ struct ka43_mcframe *ka43frame = (struct ka43_mcframe *)stkframe;
+
+ /* tell us all about it */
+ printk("KA43: machine check %d (0x%x)\n", ka43frame->mc43_code, ka43frame->mc43_code);
+ printk("KA43: reason: %s\n", ka43_mctype[ka43frame->mc43_code & 0xff]);
+
+ /* fixme check restart and first part done flags */
+
+ if ((ka43frame->mc43_code & KA43_MC_RESTART) ||
+ (ka43frame->mc43_psl & KA43_PSL_FPDONE)) {
+ printk("ka43_mchk: recovering from machine-check.\n");
+ ka43_cache_reset(); /* reset caches */
+ return; /* go on; */
+ }
+
+ /* Unknown error state, panic/halt the machine */
+ printk("KA43: Machine Check - unknown error state - halting\n");
+ machine_halt();
+}
Index: cpu_ka46.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/cpu_ka46.c,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -r1.5 -r1.6
--- cpu_ka46.c 2001/02/22 22:36:42 1.5
+++ cpu_ka46.c 2001/06/26 18:59:00 1.6
@@ -48,7 +48,8 @@
NULL, /* reboot */
NULL, /* halt */
-
+ NULL, /* mcheck - machine check */
+
ka46_init_devices, /* init_devices */
ka46_cpu_type_str
Index: cpu_ka55.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/cpu_ka55.c,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -r1.3 -r1.4
--- cpu_ka55.c 2001/02/11 23:47:25 1.3
+++ cpu_ka55.c 2001/06/26 18:59:00 1.4
@@ -46,7 +46,8 @@
NULL, /* halt */
NULL, /* init_devices */
-
+ NULL, /* mcheck - machine check */
+
ka55_cpu_type_str
},
0 /* System ID Extension from ROM */
Index: cpu_ka630.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/cpu_ka630.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- cpu_ka630.c 2001/01/17 16:13:57 1.1
+++ cpu_ka630.c 2001/06/26 18:59:00 1.2
@@ -39,7 +39,8 @@
NULL, /* reboot */
NULL, /* halt */
-
+ NULL, /* mcheck - machine check */
+
NULL, /* init_devices */
ka630_cpu_type_str
Index: cpu_ka640.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/cpu_ka640.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- cpu_ka640.c 2001/01/17 16:13:57 1.1
+++ cpu_ka640.c 2001/06/26 18:59:00 1.2
@@ -40,7 +40,8 @@
NULL, /* reboot */
NULL, /* halt */
-
+ NULL, /* mcheck - machine check */
+
NULL, /* init_devices */
ka640_cpu_type_str
Index: cpu_ka650.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/cpu_ka650.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- cpu_ka650.c 2001/01/17 16:13:57 1.1
+++ cpu_ka650.c 2001/06/26 18:59:00 1.2
@@ -40,7 +40,8 @@
NULL, /* reboot */
NULL, /* halt */
-
+ NULL, /* mcheck - machine check */
+
NULL, /* init_devices */
ka650_cpu_type_str
Index: cpu_ka660.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/cpu_ka660.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- cpu_ka660.c 2001/01/17 16:13:57 1.1
+++ cpu_ka660.c 2001/06/26 18:59:00 1.2
@@ -44,7 +44,8 @@
NULL, /* reboot */
NULL, /* halt */
-
+ NULL, /* mcheck - machine check */
+
NULL, /* init_devices */
ka660_cpu_type_str
Index: entry.S
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/entry.S,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -r1.4 -r1.5
--- entry.S 2001/05/27 12:34:13 1.4
+++ entry.S 2001/06/26 18:59:00 1.5
@@ -5,6 +5,7 @@
Copyright Dec 1998 atp.
Copyright 2000, Kenn Humborg <ke...@li...>
+ 2001 atp. Additions for Machine check handling.
*/
#include <linux/sys.h>
@@ -12,7 +13,7 @@
/* irqvec_handler is the generic handler for all interrupts and
exceptions for which a driver (or other code) has registered
- a handler. We are responsible for
+ a handler. Except machine checks. We are responsible for
o saving all registers
@@ -28,6 +29,7 @@
See Documentation/vax/interrupts.txt for the gory details */
+
.globl irqvec_handler
irqvec_handler:
/* At this point stack looks like:
@@ -218,6 +220,34 @@
popr $0x3fff /* restore R0 to FP */
moval 4(sp), sp /* Remove handler_PC */
rei
+
+/* mcheck_handler is the handler for machine check exceptions.
+ This is here, because its easier to special case it, and deal with
+ the machine dependent number of longwords than warp the generic
+ registration methods to deal with it
+ atp jun 2001
+ */
+/* ensure longword alignment */
+.align 2
+.globl machine_check_handler
+machine_check_handler:
+/* Note this doesnt use the usual exception registration, as we dont
+ * know in advance how many longwords of exception info have been pushed.
+ *
+ * The interrupt stack at this point looks like this
+ * SP: longword count of exception info
+ * exception longwords
+ * :
+ * PC
+ * PSL
+ */
+ pushr $0x3f /* push all registers in case we can restart */
+ pushab 24(sp) /* address of stack slot which holds byte count */
+ calls $1, machine_check /* in reboot.c */
+ popr $0x3f /* spring them off */
+ addl2 (sp)+,sp /* get rid of the machine check frame */
+
+ rei /* dismiss */
.data
.globl sys_call_table
Index: interrupt.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/interrupt.c,v
retrieving revision 1.11
retrieving revision 1.12
diff -u -r1.11 -r1.12
--- interrupt.c 2001/05/27 13:25:29 1.11
+++ interrupt.c 2001/06/26 18:59:00 1.12
@@ -94,17 +94,27 @@
SCB_VECTOR(i) = &stray_handlers[i].inst_jsb;
}
+
flush_icache();
}
void trap_init(void)
{
- /* Initialize the SCB with the stray interrupt/exception
+ extern void machine_check_handler(void);
+ void *mhandler;
+
+ /* Initialize the SCB with the stray interrupt/exception
handlers. Some of these will be overridden later
as device drivers hook up to their interrupts. */
setup_scb();
+ /* Install the specific machine check handler in entry.S
+ * bits 0-1 must contain 1. machine check handler is longword aligned
+ */
+ mhandler = (void *)(machine_check_handler) + 1;
+ scb.scb.mcheck = mhandler;
+
/* And tell the hardware to use this SCB */
__mtpr(__pa(&scb), PR_SCBB);
@@ -137,10 +147,11 @@
}
/* Perhaps this should be done in CPU-specific code? */
- if (register_excep_handler(0x15, corrected_read_handler, 0, 0)) {
+ if (register_excep_handler(SCB_MEMCORR, corrected_read_handler, 0, 0)) {
printk("Panic: unable to register corrected read handler\n");
machine_halt();
}
+
}
void init_IRQ(void)
Index: interrupt.h
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/interrupt.h,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -r1.4 -r1.5
--- interrupt.h 2001/01/29 00:56:19 1.4
+++ interrupt.h 2001/06/26 18:59:00 1.5
@@ -65,4 +65,3 @@
extern void reserved_instr_handler(struct pt_regs *regs, void *excep_info);
extern void corrected_read_handler(struct pt_regs *regs, void *excep_info);
extern void syscall_handler(struct pt_regs *regs, void *excep_info);
-
Index: reboot.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/reboot.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- reboot.c 2001/01/17 16:13:57 1.1
+++ reboot.c 2001/06/26 18:59:00 1.2
@@ -3,7 +3,9 @@
This file contains the standard functions that the arch-independent
kernel expects for halting, rebooting and powering off the machine.
-
+
+ It also contains the machine check dispatcher
+
The real work will be done by cpu-specific code via the machine
vector. Eventually...
@@ -49,6 +51,20 @@
mv->halt();
while (1);
+}
+
+/* This is called directly, from entry.S
+ * It checks for a cpu specific machine check handler and hands over to it.
+ * Otherwise it will just halt, as there is no way to recover without a
+ * sensible cpu specific routine
+ */
+void machine_check(void *stkframe)
+{
+ if (mv->mcheck == NULL) {
+ printk("machine check - CPU specific handler not implemented - halting\n");
+ machine_halt();
+ }
+ mv->mcheck(stkframe);
}
Index: setup.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/kernel/setup.c,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -r1.8 -r1.9
--- setup.c 2001/06/08 20:11:10 1.8
+++ setup.c 2001/06/26 18:59:00 1.9
@@ -65,7 +65,7 @@
* atp -- have a temporary one.
* Shouldn't we use strcpy here?
*/
- memcpy(command_line, "root=/dev/nfs nfsroot=/tftpboot/vaxroot\0",54);
+ memcpy(command_line, "root=/dev/nfs nfsroot=/tftpboot/vaxroot rw debug\0",63);
*cmdline_p = command_line;
/* Save unparsed command line copy for /proc/cmdline */
memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
|
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