[SPARC64]: Rewrite bootup sequence.
Instead of all of this cpu-specific code to remap the kernel
to the correct location, use portable firmware calls to do
this instead.
What we do now is the following in position independant
assembler:
chosen_node = prom_finddevice("/chosen");
prom_mmu_ihandle_cache = prom_getint(chosen_node, "mmu");
vaddr = 4MB_ALIGN(current_text_addr());
prom_translate(vaddr, &paddr_high, &paddr_low, &mode);
prom_boot_mapping_mode = mode;
prom_boot_mapping_phys_high = paddr_high;
prom_boot_mapping_phys_low = paddr_low;
prom_map(-1, 8 * 1024 * 1024, KERNBASE, paddr_low);
and that replaces the massive amount of by-hand TLB probing and
programming we used to do here.
The new code should also handle properly the case where the kernel
is mapped at the correct address already (think: future kexec
support).
Consequently, the bulk of remap_kernel() dies as does the entirety
of arch/sparc64/prom/map.S
We try to share some strings in the PROM library with the ones used
at bootup, and while we're here mark input strings to oplib.h routines
with "const" when appropriate.
There are many more simplifications now possible. For one thing, we
can consolidate the two copies we now have of a lot of cpu setup code
sitting in head.S and trampoline.S.
This is a significant step towards CONFIG_DEBUG_PAGEALLOC support.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/prom/Makefile b/arch/sparc64/prom/Makefile
index 8f2420d..c7898a5 100644
--- a/arch/sparc64/prom/Makefile
+++ b/arch/sparc64/prom/Makefile
@@ -7,4 +7,4 @@
EXTRA_CFLAGS := -Werror
lib-y := bootstr.o devops.o init.o memory.o misc.o \
- tree.o console.o printf.o p1275.o map.o cif.o
+ tree.o console.o printf.o p1275.o cif.o
diff --git a/arch/sparc64/prom/console.c b/arch/sparc64/prom/console.c
index 028a53f..eae5db8 100644
--- a/arch/sparc64/prom/console.c
+++ b/arch/sparc64/prom/console.c
@@ -67,7 +67,7 @@
}
void
-prom_puts(char *s, int len)
+prom_puts(const char *s, int len)
{
p1275_cmd("write", P1275_ARG(1,P1275_ARG_IN_BUF)|
P1275_INOUT(3,1),
diff --git a/arch/sparc64/prom/devops.c b/arch/sparc64/prom/devops.c
index 2c99b21..4641839 100644
--- a/arch/sparc64/prom/devops.c
+++ b/arch/sparc64/prom/devops.c
@@ -16,7 +16,7 @@
* Returns 0 on failure.
*/
int
-prom_devopen(char *dstr)
+prom_devopen(const char *dstr)
{
return p1275_cmd ("open", P1275_ARG(0,P1275_ARG_IN_STRING)|
P1275_INOUT(1,1),
diff --git a/arch/sparc64/prom/init.c b/arch/sparc64/prom/init.c
index 817faae..8b4b622 100644
--- a/arch/sparc64/prom/init.c
+++ b/arch/sparc64/prom/init.c
@@ -46,7 +46,7 @@
if((prom_root_node == 0) || (prom_root_node == -1))
prom_halt();
- prom_chosen_node = prom_finddevice("/chosen");
+ prom_chosen_node = prom_finddevice(prom_chosen_path);
if (!prom_chosen_node || prom_chosen_node == -1)
prom_halt();
diff --git a/arch/sparc64/prom/map.S b/arch/sparc64/prom/map.S
deleted file mode 100644
index 21b3f9c..0000000
--- a/arch/sparc64/prom/map.S
+++ /dev/null
@@ -1,72 +0,0 @@
-/* $Id: map.S,v 1.2 1999/11/19 05:53:02 davem Exp $
- * map.S: Tricky coding required to fixup the kernel OBP maps
- * properly.
- *
- * Copyright (C) 1999 David S. Miller (davem@redhat.com)
- */
-
- .text
- .align 8192
- .globl prom_boot_page
-prom_boot_page:
-call_method:
- .asciz "call-method"
- .align 8
-map:
- .asciz "map"
- .align 8
-
- /* When we are invoked, our caller has remapped us to
- * page zero, therefore we must use PC relative addressing
- * for everything after we begin performing the unmap/map
- * calls.
- */
- .globl prom_remap
-prom_remap: /* %o0 = physpage, %o1 = virtpage, %o2 = mmu_ihandle */
- rd %pc, %g1
- srl %o2, 0, %o2 ! kill sign extension
- sethi %hi(p1275buf), %g2
- or %g2, %lo(p1275buf), %g2
- ldx [%g2 + 0x10], %g3 ! prom_cif_stack
- save %g3, -(192 + 128), %sp
- ldx [%g2 + 0x08], %l0 ! prom_cif_handler
- mov %g6, %i3
- mov %g4, %i4
- mov %g5, %i5
- flushw
-
- sethi %hi(prom_remap - call_method), %g7
- or %g7, %lo(prom_remap - call_method), %g7
- sub %g1, %g7, %l2 ! call-method string
- sethi %hi(prom_remap - map), %g7
- or %g7, %lo(prom_remap - map), %g7
- sub %g1, %g7, %l4 ! map string
-
- /* OK, map the 4MB region we really live at. */
- stx %l2, [%sp + 2047 + 128 + 0x00] ! call-method
- mov 7, %l5
- stx %l5, [%sp + 2047 + 128 + 0x08] ! num_args
- mov 1, %l5
- stx %l5, [%sp + 2047 + 128 + 0x10] ! num_rets
- stx %l4, [%sp + 2047 + 128 + 0x18] ! map
- stx %i2, [%sp + 2047 + 128 + 0x20] ! mmu_ihandle
- mov -1, %l5
- stx %l5, [%sp + 2047 + 128 + 0x28] ! mode == default
- sethi %hi(4 * 1024 * 1024), %l5
- stx %l5, [%sp + 2047 + 128 + 0x30] ! size
- stx %i1, [%sp + 2047 + 128 + 0x38] ! vaddr
- stx %g0, [%sp + 2047 + 128 + 0x40] ! filler
- stx %i0, [%sp + 2047 + 128 + 0x48] ! paddr
- call %l0
- add %sp, (2047 + 128), %o0 ! argument array
-
- /* Restore hard-coded globals. */
- mov %i3, %g6
- mov %i4, %g4
- mov %i5, %g5
-
- /* Wheee.... we are done. */
- ret
- restore
-
- .align 8192
diff --git a/arch/sparc64/prom/misc.c b/arch/sparc64/prom/misc.c
index 19c44e9..9b895fa 100644
--- a/arch/sparc64/prom/misc.c
+++ b/arch/sparc64/prom/misc.c
@@ -17,14 +17,14 @@
#include <asm/system.h>
/* Reset and reboot the machine with the command 'bcommand'. */
-void prom_reboot(char *bcommand)
+void prom_reboot(const char *bcommand)
{
p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_INOUT(1, 0), bcommand);
}
/* Forth evaluate the expression contained in 'fstring'. */
-void prom_feval(char *fstring)
+void prom_feval(const char *fstring)
{
if (!fstring || fstring[0] == 0)
return;
@@ -148,21 +148,19 @@
p1275_cmd("SUNW,set-trap-table", P1275_INOUT(1, 0), tba);
}
-int mmu_ihandle_cache = 0;
-
int prom_get_mmu_ihandle(void)
{
int node, ret;
- if (mmu_ihandle_cache != 0)
- return mmu_ihandle_cache;
+ if (prom_mmu_ihandle_cache != 0)
+ return prom_mmu_ihandle_cache;
- node = prom_finddevice("/chosen");
- ret = prom_getint(node, "mmu");
+ node = prom_finddevice(prom_chosen_path);
+ ret = prom_getint(node, prom_mmu_name);
if (ret == -1 || ret == 0)
- mmu_ihandle_cache = -1;
+ prom_mmu_ihandle_cache = -1;
else
- mmu_ihandle_cache = ret;
+ prom_mmu_ihandle_cache = ret;
return ret;
}
@@ -190,7 +188,7 @@
unsigned long tte_data,
unsigned long vaddr)
{
- return p1275_cmd("call-method",
+ return p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(2, P1275_ARG_IN_64B) |
P1275_ARG(3, P1275_ARG_IN_64B) |
@@ -207,7 +205,7 @@
unsigned long tte_data,
unsigned long vaddr)
{
- return p1275_cmd("call-method",
+ return p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(2, P1275_ARG_IN_64B) |
P1275_ARG(3, P1275_ARG_IN_64B) |
@@ -223,13 +221,13 @@
int prom_map(int mode, unsigned long size,
unsigned long vaddr, unsigned long paddr)
{
- int ret = p1275_cmd("call-method",
+ int ret = p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(3, P1275_ARG_IN_64B) |
P1275_ARG(4, P1275_ARG_IN_64B) |
P1275_ARG(6, P1275_ARG_IN_64B) |
P1275_INOUT(7, 1)),
- "map",
+ prom_map_name,
prom_get_mmu_ihandle(),
mode,
size,
@@ -244,12 +242,12 @@
void prom_unmap(unsigned long size, unsigned long vaddr)
{
- p1275_cmd("call-method",
+ p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(2, P1275_ARG_IN_64B) |
P1275_ARG(3, P1275_ARG_IN_64B) |
P1275_INOUT(4, 0)),
- "unmap",
+ prom_unmap_name,
prom_get_mmu_ihandle(),
size,
vaddr);
@@ -258,7 +256,7 @@
/* Set aside physical memory which is not touched or modified
* across soft resets.
*/
-unsigned long prom_retain(char *name,
+unsigned long prom_retain(const char *name,
unsigned long pa_low, unsigned long pa_high,
long size, long align)
{
@@ -290,7 +288,7 @@
unsigned long phys_addr,
char *buf, int buflen)
{
- return p1275_cmd("call-method",
+ return p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(3, P1275_ARG_OUT_BUF) |
P1275_ARG(6, P1275_ARG_IN_64B) |
diff --git a/arch/sparc64/prom/p1275.c b/arch/sparc64/prom/p1275.c
index 59fe38b..a5a7c571 100644
--- a/arch/sparc64/prom/p1275.c
+++ b/arch/sparc64/prom/p1275.c
@@ -46,7 +46,7 @@
*/
DEFINE_SPINLOCK(prom_entry_lock);
-long p1275_cmd (char *service, long fmt, ...)
+long p1275_cmd(const char *service, long fmt, ...)
{
char *p, *q;
unsigned long flags;
diff --git a/arch/sparc64/prom/printf.c b/arch/sparc64/prom/printf.c
index a6df82c..660943e 100644
--- a/arch/sparc64/prom/printf.c
+++ b/arch/sparc64/prom/printf.c
@@ -34,7 +34,7 @@
}
void
-prom_printf(char *fmt, ...)
+prom_printf(const char *fmt, ...)
{
va_list args;
int i;
diff --git a/arch/sparc64/prom/tree.c b/arch/sparc64/prom/tree.c
index ccf7325..b1ff9e8 100644
--- a/arch/sparc64/prom/tree.c
+++ b/arch/sparc64/prom/tree.c
@@ -69,7 +69,7 @@
* Return -1 on error.
*/
__inline__ int
-prom_getproplen(int node, char *prop)
+prom_getproplen(int node, const char *prop)
{
if((!node) || (!prop)) return -1;
return p1275_cmd ("getproplen",
@@ -83,20 +83,20 @@
* was successful the length will be returned, else -1 is returned.
*/
__inline__ int
-prom_getproperty(int node, char *prop, char *buffer, int bufsize)
+prom_getproperty(int node, const char *prop, char *buffer, int bufsize)
{
int plen;
plen = prom_getproplen(node, prop);
- if((plen > bufsize) || (plen == 0) || (plen == -1))
+ if ((plen > bufsize) || (plen == 0) || (plen == -1)) {
return -1;
- else {
+ } else {
/* Ok, things seem all right. */
- return p1275_cmd ("getprop",
- P1275_ARG(1,P1275_ARG_IN_STRING)|
- P1275_ARG(2,P1275_ARG_OUT_BUF)|
- P1275_INOUT(4, 1),
- node, prop, buffer, P1275_SIZE(plen));
+ return p1275_cmd(prom_getprop_name,
+ P1275_ARG(1,P1275_ARG_IN_STRING)|
+ P1275_ARG(2,P1275_ARG_OUT_BUF)|
+ P1275_INOUT(4, 1),
+ node, prop, buffer, P1275_SIZE(plen));
}
}
@@ -104,7 +104,7 @@
* on failure.
*/
__inline__ int
-prom_getint(int node, char *prop)
+prom_getint(int node, const char *prop)
{
int intprop;
@@ -119,7 +119,7 @@
*/
int
-prom_getintdefault(int node, char *property, int deflt)
+prom_getintdefault(int node, const char *property, int deflt)
{
int retval;
@@ -131,7 +131,7 @@
/* Acquire a boolean property, 1=TRUE 0=FALSE. */
int
-prom_getbool(int node, char *prop)
+prom_getbool(int node, const char *prop)
{
int retval;
@@ -145,7 +145,7 @@
* buffer.
*/
void
-prom_getstring(int node, char *prop, char *user_buf, int ubuf_size)
+prom_getstring(int node, const char *prop, char *user_buf, int ubuf_size)
{
int len;
@@ -160,7 +160,7 @@
* YES = 1 NO = 0
*/
int
-prom_nodematch(int node, char *name)
+prom_nodematch(int node, const char *name)
{
char namebuf[128];
prom_getproperty(node, "name", namebuf, sizeof(namebuf));
@@ -172,7 +172,7 @@
* 'nodename'. Return node if successful, zero if not.
*/
int
-prom_searchsiblings(int node_start, char *nodename)
+prom_searchsiblings(int node_start, const char *nodename)
{
int thisnode, error;
@@ -294,7 +294,7 @@
* property types for this node.
*/
__inline__ char *
-prom_nextprop(int node, char *oprop, char *buffer)
+prom_nextprop(int node, const char *oprop, char *buffer)
{
char buf[32];
@@ -314,15 +314,17 @@
}
int
-prom_finddevice(char *name)
+prom_finddevice(const char *name)
{
- if(!name) return 0;
- return p1275_cmd ("finddevice", P1275_ARG(0,P1275_ARG_IN_STRING)|
- P1275_INOUT(1, 1),
- name);
+ if (!name)
+ return 0;
+ return p1275_cmd(prom_finddev_name,
+ P1275_ARG(0,P1275_ARG_IN_STRING)|
+ P1275_INOUT(1, 1),
+ name);
}
-int prom_node_has_property(int node, char *prop)
+int prom_node_has_property(int node, const char *prop)
{
char buf [32];
@@ -339,7 +341,7 @@
* of 'size' bytes. Return the number of bytes the prom accepted.
*/
int
-prom_setprop(int node, char *pname, char *value, int size)
+prom_setprop(int node, const char *pname, char *value, int size)
{
if(size == 0) return 0;
if((pname == 0) || (value == 0)) return 0;
@@ -364,7 +366,7 @@
* FIXME: Should work for v0 as well
*/
int
-prom_pathtoinode(char *path)
+prom_pathtoinode(const char *path)
{
int node, inst;