[parisc-linux] [grundler@puffin.external.hp.com: commit FP coproc enable code?]
Phil Schwan
pschwan@thepuffingroup.com
Fri, 1 Oct 1999 15:12:06 -0400
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[ I think I've fixed the mailing list; here's the mails from Grant
that it was dropping --phil ]
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From: grundler@puffin.external.hp.com
Message-Id: <199910011724.LAA09983@puffin.external.hp.com>
To: parisc-linux@thepuffingroup.com
Subject: commit FP coproc enable code?
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[ 4th try...I'm not getting a copy back from the reflector...]
Hi all,
I'd like to commit changes to enable FP coproc for PA 1.1 arch.
Any objections?
o FP enable via writing cr10 (CCR) register. Not doing this the "right"
way - which is to use PDC_COPROC but it will work for all PA1.1
platforms.
o remove extraneous console output. I want to post console output
for my next problem: kernel panic when trying to kill idle_task.
thanks,
grant
Index: linux/arch/parisc/kernel/head.S
===================================================================
RCS file: /home/cvs/parisc/linux/arch/parisc/kernel/head.S,v
retrieving revision 1.32
diff -u -r1.32 head.S
--- head.S 1999/08/31 19:25:23 1.32
+++ head.S 1999/09/30 22:43:03
@@ -295,9 +295,20 @@
ldil L%KERNEL_PSW,%r10
ldo R%KERNEL_PSW(%r10),%r10
mtctl %r10,%ipsw
-
- mtctl %r0,%cr17 ; Clear two-level IIA Space Queue
- mtctl %r0,%cr17 ; effectively setting kernel space.
+
+ ; Just assume we have an FP coprocessor and assume firmware
+ ; did not enable it.
+ ; Pass what firmware set CCR (cr10) to start_parisc() and print it.
+ mfctl %cr10, %arg2
+
+#define FP_COPROC_ENABLE 0xc0
+ ldil L%FP_COPROC_ENABLE,%r10
+ ldo R%FP_COPROC_ENABLE(%r10),%r10
+ mtctl %r10,%cr10 ; CCR
+
+
+ mtctl %r0,%cr17 ; Clear two-level IIA Space Queue
+ mtctl %r0,%cr17 ; effectively setting kernel space.
ldil L%start_parisc,%r10
ldo R%start_parisc(%r10),%r10
Index: linux/arch/parisc/kernel/setup.c
===================================================================
RCS file: /home/cvs/parisc/linux/arch/parisc/kernel/setup.c,v
retrieving revision 1.59
diff -u -r1.59 setup.c
--- setup.c 1999/09/28 22:34:57 1.59
+++ setup.c 1999/09/30 22:43:15
@@ -587,13 +587,16 @@
#define PA(x) (void *)((unsigned long)(x)&~0xc0000000)
extern int pdc_call_x(void *,...);
+#if 0
static char iodc_tbuf[4096] __attribute__((aligned(4096))) = "Hallo\n";
static char iodc_rbuf[4096] __attribute__((aligned(4096))) = "Hallo\n";
+#endif
__initfunc(void start_parisc(unsigned long new_memory_start,
- char *bootloader_command_line))
+ char *bootloader_command_line,
+ unsigned long ccr))
{
-#if 1
+#if 0
pdc_call_x(
(void *)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
PAGE0->mem_cons.spa, PAGE0->mem_cons.dp.layers,
@@ -613,28 +616,24 @@
pdc_console_init();
printk("The Kernel has started...\n");
+#if 0
printk("Hmm\n");
printk("%d\n", 7);
printk("%d\n", *(unsigned *)0xc0000000);
-
+#endif
printk("%p\n", bootloader_command_line);
printk("You are running a %dMHz PA-RISC-Machine with %dMB of RAM.\n",
((int)PAGE0->mem_10msec/10000), PAGE0->imm_max_mem>>20);
+ printk("FP CCR was set to: 0x%x\n", (int) ccr);
parisc_memstart = new_memory_start;
pdc = PAGE0->mem_pdc;
- printk("You are running a %dMHz PA-RISC-Machine with %dMB of RAM.\n",
- ((int)PAGE0->mem_10msec/10000), PAGE0->imm_max_mem>>20);
-
if (bootloader_command_line)
strcpy(saved_command_line,__va(bootloader_command_line));
else
saved_command_line[0] = 0;
- printk("You are running a %dMHz PA-RISC-Machine with %dMB of RAM.\n",
- ((int)PAGE0->mem_10msec/10000), PAGE0->imm_max_mem>>20);
-
printk("Free memory was at 0x%08lX (=stackbase, stacksize=0x%08lX).\n",
new_memory_start,(unsigned long)KERNEL_STACKSIZE );
@@ -659,7 +658,7 @@
#endif
initrd_below_start_ok = 1;
- printk("initrd: %08x-%08x\n", initrd_start, initrd_end);
+ printk("initrd: %08x-%08x\n", (int) initrd_start, (int) initrd_end);
*memory_start_p = parisc_memstart;
*memory_end_p = 0xc2000000;
Index: linux/drivers/block/rd.c
===================================================================
RCS file: /home/cvs/parisc/linux/drivers/block/rd.c,v
retrieving revision 1.3
diff -u -r1.3 rd.c
--- rd.c 1999/09/22 18:10:17 1.3
+++ rd.c 1999/09/30 22:43:26
@@ -219,7 +219,6 @@
{
int left;
- printk("initrd_read\n");
left = initrd_end - initrd_start - *ppos;
if (count > left) count = left;
if (count == 0) return 0;
Index: linux/fs/buffer.c
===================================================================
RCS file: /home/cvs/parisc/linux/fs/buffer.c,v
retrieving revision 1.3
diff -u -r1.3 buffer.c
--- buffer.c 1999/09/22 18:10:35 1.3
+++ buffer.c 1999/09/30 22:44:21
@@ -840,8 +840,6 @@
struct buffer_head * bh;
- printk("bread bh=%08x\n", bh);
-// printk("%08x\n", &buffer_page(bh)->flags);
bh = getblk(dev, block, size);
if (buffer_uptodate(bh))
return bh;
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