Virtualization/openbios
1
0
Fork 0
mirror of https://gitlab.com/qemu-project/openbios.git synced 2024-02-13 08:34:06 +08:00
Code Issues Projects Releases Wiki Activity

sparc64: fix registers dealing with client (Igor Kovalenko)

Browse Source 
Signed-off-by: igor.v.kovalenko@gmail.com


git-svn-id: svn://coreboot.org/openbios/trunk/openbios-devel@508 f158a5a8-5612-0410-a976-696ce0be7e32
This commit is contained in:
igor.v.kovalenko
2009-07-11 12:25:26 +00:00
committed by Blue Swirl
parent 853aec9291
commit 5f5b8d6f8c
7 changed files with 49 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
arch/sparc64/aoutload.c
View File

@@ -125,19 +125,10 @@ int aout_load(struct sys_info *info, const char *filename)
debug("entry point is %#lx\n", start);
printf("Jumping to entry point...\n");
#if 1
{
int (*entry)(unsigned long p1, unsigned long p2, unsigned long p3,
unsigned long p4, unsigned long p5);
extern int of_client_interface( int *params );
entry = (void *) addr_fixup(start);
__asm__ __volatile__("clr %i3\n");
image_retval = entry(0, 0, 0, 0, (unsigned long)&of_client_interface);
extern int sparc64_of_client_interface( int *params );
image_retval = start_client_image(addr_fixup(start), (uint64_t)&sparc64_of_client_interface);
}
#endif
printf("Image returned with return value %#x\n", image_retval);
retval = 0;

4
arch/sparc64/boot.c
View File

@@ -26,11 +26,11 @@ void boot(void)
if (kernel_size) {
void (*entry)(unsigned long p1, unsigned long p2, unsigned long p3,
unsigned long p4, unsigned long p5);
extern int of_client_interface( int *params );
extern int sparc64_of_client_interface( int *params );
printk("[sparc64] Kernel already loaded\n");
entry = (void *) (unsigned long)kernel_image;
entry(0, 0, 0, 0, (unsigned long)&of_client_interface);
entry(0, 0, 0, 0, (unsigned long)&sparc64_of_client_interface);
}
if(!path) {

3
arch/sparc64/boot.h
View File

@@ -22,8 +22,9 @@ int linux_load(struct sys_info *info, const char *file, const char *cmdline);
int fcode_load(const char *filename);
// context.c
extern struct context *__context;
extern struct context * volatile __context;
uint64_t start_elf(uint64_t entry_point, uint64_t param);
uint64_t start_client_image(uint64_t entry_point, uint64_t cif_handler);
// boot.c
extern struct sys_info sys_info;

6
arch/sparc64/build.xml
View File

@@ -29,6 +29,10 @@
<rule><![CDATA[ $(SRCDIR)/arch/sparc64/vectors.S
$(CC) $$EXTRACFLAGS $(AS_FLAGS) $(CFLAGS) $(INCLUDES) -c -o $@ $^]]></rule>
</executable>
<executable name="target/arch/sparc64/call-client.o" target="target">
<rule><![CDATA[ $(SRCDIR)/arch/sparc64/call-client.S
$(CC) $$EXTRACFLAGS $(AS_FLAGS) $(CFLAGS) $(INCLUDES) -c -o $@ $^]]></rule>
</executable>
<executable name="openbios-plain.elf" target="target" condition="IMAGE_ELF">
<rule>
@@ -39,6 +43,7 @@
<object source="plainboot.c"/>
<external-object source="target/arch/sparc64/vectors.o"/>
<external-object source="target/arch/sparc64/entry.o"/>
<external-object source="target/arch/sparc64/call-client.o"/>
<external-object source="libsparc64.a"/>
<external-object source="libbootstrap.a"/>
<external-object source="libdrivers.a"/>
@@ -77,6 +82,7 @@
<external-object source="target/arch/sparc64/vectors.o"/>
<external-object source="target/arch/sparc64/entry.o"/>
<external-object source="target/arch/sparc64/builtin.o"/>
<external-object source="target/arch/sparc64/call-client.o"/>
<external-object source="libsparc64.a"/>
<external-object source="libbootstrap.a"/>
<external-object source="libdrivers.a"/>

34
arch/sparc64/context.c
View File

@@ -10,7 +10,7 @@
#include "boot.h"
#define MAIN_STACK_SIZE 16384
#define IMAGE_STACK_SIZE 4096
#define IMAGE_STACK_SIZE 4096*2
#define debug printk
@@ -23,7 +23,7 @@ void __exit_context(void); /* assembly routine */
* to start us up.
*/
static struct context main_ctx = {
.regs[REG_SP] = (uint64_t) &_estack - 2047 - 96,
.regs[REG_SP] = (uint64_t) &_estack - STACK_BIAS - 96,
.pc = (uint64_t) start_main,
.npc = (uint64_t) start_main + 4,
.return_addr = (uint64_t) __exit_context,
@@ -31,7 +31,7 @@ static struct context main_ctx = {
/* This is used by assembly routine to load/store the context which
* it is to switch/switched. */
struct context *__context = &main_ctx;
struct context * volatile __context = &main_ctx;
/* Stack for loaded ELF image */
static uint8_t image_stack[IMAGE_STACK_SIZE];
@@ -62,19 +62,25 @@ static void start_main(void)
__context = boot_ctx;
}
static uint64_t ALIGN_SIZE(uint64_t x, uint64_t a)
{
return (x + a - 1) & ~(a-1);
}
/* Setup a new context using the given stack.
*/
struct context *
init_context(uint8_t *stack, uint64_t stack_size, int num_params)
{
struct context *ctx;
uint8_t *stack_top = stack + stack_size;
ctx = (struct context *)
(stack + stack_size - (sizeof(*ctx) + num_params*sizeof(uint32_t)));
(stack_top - ALIGN_SIZE(sizeof(*ctx) + num_params*sizeof(uint64_t), sizeof(uint64_t)));
memset(ctx, 0, sizeof(*ctx));
/* Fill in reasonable default for flat memory model */
ctx->regs[REG_SP] = virt_to_phys(SP_LOC(ctx));
ctx->regs[REG_SP] = virt_to_phys(stack_top - STACK_BIAS - 192);
ctx->return_addr = virt_to_phys(__exit_context);
return ctx;
@@ -85,10 +91,11 @@ struct context *switch_to(struct context *ctx)
{
struct context *save, *ret;
debug("switching to new context:\n");
debug("switching to new context: entry point %#llx stack 0x%016llx\n", ctx->pc, ctx->regs[REG_SP]);
save = __context;
__context = ctx;
//asm ("pushl %cs; call __switch_context");
asm ("call __switch_context_nosave; nop");
ret = __context;
__context = save;
return ret;
@@ -109,3 +116,18 @@ uint64_t start_elf(uint64_t entry_point, uint64_t param)
//return ctx->eax;
return 0;
}
/* Start client image */
uint64_t start_client_image(uint64_t entry_point, uint64_t cif_handler)
{
struct context *ctx;
ctx = init_context(image_stack, sizeof image_stack, 0);
ctx->pc = entry_point;
ctx->npc = entry_point+4;
ctx->regs[REG_O0+4] = cif_handler;
ctx = switch_to(ctx);
return 0;
}

2
arch/sparc64/context.h
View File

@@ -1,6 +1,8 @@
#ifndef SPARC64_CONTEXT_H
#define SPARC64_CONTEXT_H
#define STACK_BIAS 2047
struct context {
/* General registers */
uint64_t regs[32];

8
arch/sparc64/switch.S
View File

@@ -24,7 +24,12 @@
/* XXX: totally bogus for sparc, need to save and restore all windows */
__switch_context:
/* make sure caller's windows are on caller's stack */
flushw;
/* Save everything in current stack */
setx __context, %g2, %g1
stx %g3, [%g1 + 24]
stx %g4, [%g1 + 32]
@@ -61,7 +66,8 @@ __switch_context:
__switch_context_nosave:
/* Interrupts are not allowed... */
/* make sure caller's windows are on caller's stack */
flushw
/* Load all registers
*/
setx __context, %g2, %g1