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-rw-r--r--src/cpu/amd/model_lx/vsmsetup.c622
1 files changed, 290 insertions, 332 deletions
diff --git a/src/cpu/amd/model_lx/vsmsetup.c b/src/cpu/amd/model_lx/vsmsetup.c
index e2922e1859..5b2477dfb7 100644
--- a/src/cpu/amd/model_lx/vsmsetup.c
+++ b/src/cpu/amd/model_lx/vsmsetup.c
@@ -69,13 +69,13 @@
* software, even if advised of the possibility of such damage.
*
* $Id: vsmsetup.c,v 1.8 2006/09/08 12:47:57 andrei Exp $
-*
-* Copyright (C) 2007 Advanced Micro Devices
-*
+ *
+ * Copyright (C) 2007 Advanced Micro Devices
+ *
*--------------------------------------------------------------------*/
-/* Modified to be a self sufficient plug in so that it can be used
- without reliance on other parts of core Linuxbios
+/* Modified to be a self sufficient plug in so that it can be used
+ without reliance on other parts of core Linuxbios
(C) 2005 Nick.Barker9@btinternet.com
Used initially for epia-m where there are problems getting the bios
@@ -84,96 +84,83 @@
/* Declare a temporary global descriptor table - necessary because the
Core part of the bios no longer sets up any 16 bit segments */
-__asm__ (
- /* pointer to original gdt */
- "gdtarg: \n"
- " .word gdt_limit \n"
- " .long gdt \n"
-
- /* compute the table limit */
- "__mygdt_limit = __mygdt_end - __mygdt - 1 \n"
-
- "__mygdtaddr: \n"
- " .word __mygdt_limit \n"
- " .long __mygdt \n"
-
- "__mygdt: \n"
- /* selgdt 0, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 8, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 0x10, flat code segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x9b, 0xcf, 0x00 \n"
-
- /* selgdt 0x18, flat data segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x93, 0xcf, 0x00 \n"
-
- /* selgdt 0x20, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 0x28 16-bit 64k code at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x9a, 0, 0 \n"
-
- /* selgdt 0x30 16-bit 64k data at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x92, 0, 0 \n"
-
- "__mygdt_end: \n"
+__asm__(
+ /* pointer to original gdt */
+ "gdtarg: \n"
+ " .word gdt_limit \n"
+ " .long gdt \n"
+ /* compute the table limit */
+ "__mygdt_limit = __mygdt_end - __mygdt - 1 \n"
+ "__mygdtaddr: \n"
+ " .word __mygdt_limit \n"
+ " .long __mygdt \n"
+ "__mygdt: \n"
+ /* selgdt 0, unused */
+ " .word 0x0000, 0x0000 \n"
+ " .byte 0x00, 0x00, 0x00, 0x00 \n"
+ /* selgdt 8, unused */
+ " .word 0x0000, 0x0000 \n"
+ " .byte 0x00, 0x00, 0x00, 0x00 \n"
+ /* selgdt 0x10, flat code segment */
+ " .word 0xffff, 0x0000 \n"
+ " .byte 0x00, 0x9b, 0xcf, 0x00 \n"
+ /* selgdt 0x18, flat data segment */
+ " .word 0xffff, 0x0000 \n"
+ " .byte 0x00, 0x93, 0xcf, 0x00 \n"
+ /* selgdt 0x20, unused */
+ " .word 0x0000, 0x0000 \n"
+ " .byte 0x00, 0x00, 0x00, 0x00 \n"
+ /* selgdt 0x28 16-bit 64k code at 0x00000000 */
+ " .word 0xffff, 0x0000 \n"
+ " .byte 0, 0x9a, 0, 0 \n"
+ /* selgdt 0x30 16-bit 64k data at 0x00000000 */
+ " .word 0xffff, 0x0000 \n"
+ " .byte 0, 0x92, 0, 0 \n"
+ "__mygdt_end: \n"
);
/* Declare a pointer to where our idt is going to be i.e. at mem zero */
-__asm__ ("__myidt: \n"
- /* 16-bit limit */
- " .word 1023 \n"
- /* 24-bit base */
- " .long 0 \n"
- " .word 0 \n"
+__asm__(
+ "__myidt: \n"
+ /* 16-bit limit */
+ " .word 1023 \n"
+ /* 24-bit base */
+ " .long 0 \n"
+ " .word 0 \n"
);
-/* The address arguments to this function are PHYSICAL ADDRESSES */
+/* The address arguments to this function are PHYSICAL ADDRESSES */
static void real_mode_switch_call_vsm(unsigned long smm, unsigned long sysm)
{
uint16_t entryHi = (VSA2_ENTRY_POINT & 0xffff0000) >> 4;
uint16_t entryLo = (VSA2_ENTRY_POINT & 0xffff);
- __asm__ __volatile__ (
- // paranoia -- does ecx get saved? not sure. This is
+ __asm__ __volatile__(
+ // paranoia -- does ecx get saved? not sure. This is
// the easiest safe thing to do.
" pushal \n"
/* save the stack */
" mov %%esp, __stack \n"
" jmp 1f \n"
- "__stack: .long 0 \n"
- "1:\n"
+ "__stack: .long 0 \n" "1:\n"
/* get devfn into %%ecx */
" movl %%esp, %%ebp \n"
#if 0
- /* I'm not happy about that pushal followed by esp-relative references.
- * just do hard-codes for now
- */
+ /* I'm not happy about that pushal followed by esp-relative
+ * references. Just do hard-codes for now
+ */
" movl 8(%%ebp), %%ecx \n"
" movl 12(%%ebp), %%edx \n"
#endif
" movl %0, %%ecx \n"
" movl %1, %%edx \n"
-
/* load 'our' gdt */
" lgdt %%cs:__mygdtaddr \n"
-
/* This configures CS properly for real mode. */
" ljmp $0x28, $__rms_16bit\n"
"__rms_16bit: \n"
" .code16 \n"
/* 16 bit code from here on... */
-
/* Load the segment registers w/ properly configured segment
* descriptors. They will retain these configurations (limits,
* writability, etc.) once protected mode is turned off. */
@@ -183,73 +170,67 @@ static void real_mode_switch_call_vsm(unsigned long smm, unsigned long sysm)
" mov %%ax, %%fs \n"
" mov %%ax, %%gs \n"
" mov %%ax, %%ss \n"
-
/* Turn off protection (bit 0 in CR0) */
" movl %%cr0, %%eax \n"
" andl $0xFFFFFFFE, %%eax \n"
" movl %%eax, %%cr0 \n"
-
/* Now really going into real mode */
" ljmp $0, $__rms_real\n"
"__rms_real: \n"
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case. */
+ /* put the stack at the end of page zero.
+ * that way we can easily share it between real and protected,
+ * since the 16-bit ESP at segment 0 will work for any case.
+ */
+
/* Setup a stack */
" mov $0x0, %%ax \n"
" mov %%ax, %%ss \n"
" movl $0x1000, %%eax \n"
" movl %%eax, %%esp \n"
-
/* Load our 16 it idt */
" xor %%ax, %%ax \n"
" mov %%ax, %%ds \n"
" lidt __myidt \n"
-
/* Dump zeros in the other segregs */
- " mov %%ax, %%es \n"
+ " mov %%ax, %%es \n"
/* FixMe: Big real mode for gs, fs? */
- " mov %%ax, %%fs \n"
- " mov %%ax, %%gs \n"
+ " mov %%ax, %%fs \n"
+ " mov %%ax, %%gs \n"
" mov $0x40, %%ax \n"
" mov %%ax, %%ds \n"
- //" mov %%cx, %%ax \n"
+ //" mov %%cx, %%ax \n"
" movl %0, %%ecx \n"
" movl %1, %%edx \n"
-
/* call the VSA2 entry point address */
" lcall %2, %3\n"
-
- /* if we got here, just about done.
+ /* if we got here, just about done.
* Need to get back to protected mode */
- " movl %%cr0, %%eax \n"
- " orl $0x0000001, %%eax\n" /* PE = 1 */
+ " movl %%cr0, %%eax \n"
+ " orl $0x0000001, %%eax\n" /* PE = 1 */
" movl %%eax, %%cr0 \n"
-
/* Now that we are in protected mode jump to a 32 bit code segment. */
" data32 ljmp $0x10, $vsmrestart\n"
"vsmrestart:\n"
" .code32\n"
- " movw $0x18, %%ax \n"
- " mov %%ax, %%ds \n"
+ " movw $0x18, %%ax \n"
+ " mov %%ax, %%ds \n"
" mov %%ax, %%es \n"
" mov %%ax, %%fs \n"
" mov %%ax, %%gs \n"
" mov %%ax, %%ss \n"
-
/* restore proper gdt and idt */
" lgdt %%cs:gdtarg \n"
" lidt idtarg \n"
-
".globl vsm_exit \n"
"vsm_exit: \n"
" mov __stack, %%esp \n"
- " popal \n"
- :: "g" (smm), "g" (sysm), "g" (entryHi), "g" (entryLo));
+ " popal \n"::
+ "g" (smm), "g"(sysm), "g"(entryHi), "g"(entryLo)
+ );
}
-__asm__ (".text\n""real_mode_switch_end:\n");
+__asm__(".text\n" "real_mode_switch_end:\n");
extern char real_mode_switch_end[];
// andrei: some VSA virtual register helpers: raw read and MSR read
@@ -257,17 +238,15 @@ extern char real_mode_switch_end[];
uint32_t VSA_vrRead(uint16_t classIndex)
{
unsigned eax, ebx, ecx, edx;
- asm volatile(
-
- "movw $0x0AC1C, %%dx \n"
- "orl $0x0FC530000, %%eax \n"
- "outl %%eax, %%dx \n"
- "addb $2, %%dl \n"
- "inw %%dx, %%ax \n"
-
- : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
- : "a" (classIndex)
- );
+ asm volatile (
+ "movw $0x0AC1C, %%dx \n"
+ "orl $0x0FC530000, %%eax \n"
+ "outl %%eax, %%dx \n"
+ "addb $2, %%dl \n"
+ "inw %%dx, %%ax \n"
+ : "=a" (eax), "=b"(ebx), "=c"(ecx), "=d"(edx)
+ : "a"(classIndex)
+ );
return eax;
}
@@ -275,17 +254,15 @@ uint32_t VSA_vrRead(uint16_t classIndex)
uint32_t VSA_msrRead(uint32_t msrAddr)
{
unsigned eax, ebx, ecx, edx;
- asm volatile(
-
+ asm volatile (
"movw $0x0AC1C, %%dx \n"
"movl $0x0FC530007, %%eax \n"
"outl %%eax, %%dx \n"
"addb $2, %%dl \n"
"inw %%dx, %%ax \n"
-
- : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
- : "c" (msrAddr)
- );
+ : "=a" (eax), "=b"(ebx), "=c"(ecx), "=d"(edx)
+ : "c"(msrAddr)
+ );
return eax;
}
@@ -296,38 +273,33 @@ void do_vsmbios(void)
unsigned long busdevfn;
unsigned int rom = 0;
unsigned char *buf;
- unsigned int size = SMM_SIZE*1024;
+ unsigned int size = SMM_SIZE * 1024;
int i;
- unsigned long ilen, olen;
-
+ unsigned long ilen, olen;
+
printk_err("do_vsmbios\n");
/* clear vsm bios data area */
for (i = 0x400; i < 0x500; i++) {
- *(volatile unsigned char *) i = 0;
+ *(volatile unsigned char *)i = 0;
}
/* declare rom address here - keep any config data out of the way
* of core LXB stuff */
/* this is the base of rom on the LX at present. At some point, this has to be
- * much better parameterized
- */
- //rom = 0xfff80000;
- //rom = 0xfffc0000;
+ * much better parameterized
+ */
/* the VSA starts at the base of rom - 64 */
//rom = ((unsigned long) 0) - (ROM_SIZE + 64*1024);
-
- //rom = 0xfffc8000;
-
//VSA is cat onto the end after LB builds
- rom = ((unsigned long) 0) - (ROM_SIZE + 36 * 1024);
- buf = (unsigned char *) VSA2_BUFFER;
- olen = unrv2b((uint8_t *)rom, buf, &ilen);
+ rom = ((unsigned long)0) - (ROM_SIZE + 36 * 1024);
+ buf = (unsigned char *)VSA2_BUFFER;
+ olen = unrv2b((uint8_t *) rom, buf, &ilen);
printk_debug("buf ilen %d olen%d\n", ilen, olen);
printk_debug("buf %p *buf %d buf[256k] %d\n",
- buf, buf[0], buf[SMM_SIZE*1024]);
+ buf, buf[0], buf[SMM_SIZE * 1024]);
printk_debug("buf[0x20] signature is %x:%x:%x:%x\n",
- buf[0x20] ,buf[0x21] ,buf[0x22],buf[0x23]);
+ buf[0x20], buf[0x21], buf[0x22], buf[0x23]);
/* check for post code at start of vsainit.bin. If you don't see it,
don't bother. */
if ((buf[0x20] != 0xb0) || (buf[0x21] != 0x10) ||
@@ -336,11 +308,6 @@ void do_vsmbios(void)
return;
}
- //memcpy((void *) VSA2_BUFFER, buf, size);
-
- //for (i = 0; i < 0x800000; i++)
- // outb(0xaa, 0x80);
-
/* ecx gets smm, edx gets sysm */
printk_err("Call real_mode_switch_call_vsm\n");
real_mode_switch_call_vsm(MSR_GLIU0_SMM, MSR_GLIU0_SYSMEM);
@@ -350,38 +317,39 @@ void do_vsmbios(void)
outb(0x12, 0x41);
// check that VSA is running OK
- if(VSA_vrRead(SIGNATURE) == VSA2_SIGNATURE)
+ if (VSA_vrRead(SIGNATURE) == VSA2_SIGNATURE)
printk_debug("do_vsmbios: VSA2 VR signature verified\n");
- else printk_err("do_vsmbios: VSA2 VR signature not valid, install failed!\n");
+ else
+ printk_err
+ ("do_vsmbios: VSA2 VR signature not valid, install failed!\n");
}
-
-// we had hoped to avoid this.
-// this is a stub IDT only. It's main purpose is to ignore calls
-// to the BIOS.
+// we had hoped to avoid this.
+// this is a stub IDT only. It's main purpose is to ignore calls
+// to the BIOS.
// no longer. Dammit. We have to respond to these.
struct realidt {
unsigned short offset, cs;
-};
+};
// from a handy writeup that andrey found.
-// handler.
-// There are some assumptions we can make here.
-// First, the Top Of Stack (TOS) is located on the top of page zero.
-// we can share this stack between real and protected mode.
+// handler.
+// There are some assumptions we can make here.
+// First, the Top Of Stack (TOS) is located on the top of page zero.
+// we can share this stack between real and protected mode.
// that simplifies a lot of things ...
-// we'll just push all the registers on the stack as longwords,
-// and pop to protected mode.
-// second, since this only ever runs as part of linuxbios,
+// we'll just push all the registers on the stack as longwords,
+// and pop to protected mode.
+// second, since this only ever runs as part of linuxbios,
// we know all the segment register values -- so we don't save any.
-// keep the handler that calls things small. It can do a call to
+// keep the handler that calls things small. It can do a call to
// more complex code in linuxbios itself. This helps a lot as we don't
// have to do address fixup in this little stub, and calls are absolute
// so the handler is relocatable.
void handler(void)
{
- __asm__ __volatile__ (
+ __asm__ __volatile__(
" .code16 \n"
"idthandle: \n"
" pushal \n"
@@ -389,12 +357,12 @@ void handler(void)
" ljmp $0, $callbiosint16\n"
"end_idthandle: \n"
" .code32 \n"
- );
+ );
}
void debughandler(void)
{
- __asm__ __volatile__ (
+ __asm__ __volatile__(
" .code16 \n"
"debughandle: \n"
" pushw %cx \n"
@@ -403,99 +371,91 @@ void debughandler(void)
" loop dbh1 \n"
" popw %cx \n"
" iret \n"
- "end_debughandle: \n"
+ "end_debughandle: \n"
".code32 \n"
- );
+ );
}
// Calling conventions. The first C function is called with this stuff
// on the stack. They look like value parameters, but note that if you
-// modify them they will go back to the INTx function modified.
+// modify them they will go back to the INTx function modified.
// the C function will call the biosint function with these as
-// REFERENCE parameters. In this way, we can easily get
+// REFERENCE parameters. In this way, we can easily get
// returns back to the INTx caller (i.e. vgabios)
void callbiosint(void)
{
- __asm__ __volatile__ (
+ __asm__ __volatile__(
" .code16 \n"
"callbiosint16: \n"
" push %ds \n"
" push %es \n"
- " push %fs \n"
- " push %gs \n"
+ " push %fs \n" " push %gs \n"
// clean up the int #. To save space we put it in the lower
- // byte. But the top 24 bits are junk.
+ // byte. But the top 24 bits are junk.
" andl $0xff, %eax\n"
// this push does two things:
// - put the INT # on the stack as a parameter
// - provides us with a temp for the %cr0 mods.
- " pushl %eax \n"
- " movb $0xbb, %al\n"
- " outb %al, $0x80\n"
- " movl %cr0, %eax\n"
- " orl $0x00000001, %eax\n" /* PE = 1 */
+ " pushl %eax \n"
+ " movb $0xbb, %al\n"
+ " outb %al, $0x80\n"
+ " movl %cr0, %eax\n"
+ " orl $0x00000001, %eax\n" /* PE = 1 */
" movl %eax, %cr0\n"
/* Now that we are in protected mode jump to a 32 bit code segment. */
" data32 ljmp $0x10, $biosprotect\n"
"biosprotect: \n"
" .code32 \n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- " lidt idtarg \n"
- " call biosint \n"
+ " movw $0x18, %ax\n"
+ " mov %ax, %ds\n"
+ " mov %ax, %es\n"
+ " mov %ax, %fs\n"
+ " mov %ax, %gs\n"
+ " mov %ax, %ss\n"
+ " lidt idtarg \n"
+ " call biosint \n"
// back to real mode ...
" ljmp $0x28, $__rms_16bit2\n"
- "__rms_16bit2: \n"
- " .code16 \n"
+ "__rms_16bit2: \n"
+ " .code16 \n"
/* 16 bit code from here on... */
/* Load the segment registers w/ properly configured segment
* descriptors. They will retain these configurations (limits,
* writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
+ " mov $0x30, %ax\n"
+ " mov %ax, %ds\n"
+ " mov %ax, %es\n"
+ " mov %ax, %fs\n"
+ " mov %ax, %gs\n"
+ " mov %ax, %ss\n"
/* Turn off protection (bit 0 in CR0) */
" movl %cr0, %eax \n"
" andl $0xFFFFFFFE, %eax \n"
" movl %eax, %cr0 \n"
-
/* Now really going into real mode */
" ljmp $0, $__rms_real2 \n"
"__rms_real2: \n"
-
/* Setup a stack
* FixME: where is esp? */
- /* no need for a fix here. The esp is shared from 32-bit and 16-bit mode.
- * you have to hack on the ss, but the esp remains the same across
- * modes.
- */
+ /* no need for a fix here. The esp is shared from 32-bit and 16-bit mode.
+ * you have to hack on the ss, but the esp remains the same across
+ * modes.
+ */
" mov $0x0, %ax \n"
" mov %ax, %ss \n"
-
/* debugging for RGM */
" mov $0x11, %al \n"
" outb %al, $0x80 \n"
-
/* Load our 16 bit idt */
" xor %ax, %ax \n"
" mov %ax, %ds \n"
" lidt __myidt \n"
-
/* Dump zeros in the other segregs */
" mov %ax, %es \n"
" mov %ax, %fs \n"
" mov %ax, %gs \n"
" mov $0x40, %ax \n"
" mov %ax, %ds \n"
-
/* pop the INT # that you pushed earlier */
" popl %eax \n"
" pop %gs \n"
@@ -504,12 +464,11 @@ void callbiosint(void)
" pop %ds \n"
" popal \n"
" iret \n"
- " .code32 \n"
- );
+ " .code32 \n");
}
enum {
- PCIBIOS = 0x1a,
+ PCIBIOS = 0x1a,
MEMSIZE = 0x12
};
@@ -519,29 +478,29 @@ int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags
- );
+ unsigned long *pecx, unsigned long *peax,
+ unsigned long *pflags);
int biosint(unsigned long intnumber,
unsigned long gsfs, unsigned long dses,
unsigned long edi, unsigned long esi,
- unsigned long ebp, unsigned long esp,
- unsigned long ebx, unsigned long edx,
- unsigned long ecx, unsigned long eax,
+ unsigned long ebp, unsigned long esp,
+ unsigned long ebx, unsigned long edx,
+ unsigned long ecx, unsigned long eax,
unsigned long cs_ip, unsigned short stackflags)
{
- unsigned long ip;
- unsigned long cs;
+ unsigned long ip;
+ unsigned long cs;
unsigned long flags;
int ret = -1;
ip = cs_ip & 0xffff;
cs = cs_ip >> 16;
flags = stackflags;
-
+
printk_debug("biosint: INT# 0x%lx\n", intnumber);
- printk_debug("biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n",
- eax, ebx, ecx, edx);
+ printk_debug("biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n",
+ eax, ebx, ecx, edx);
printk_debug("biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n",
ebp, esp, edi, esi);
printk_debug("biosint: ip 0x%x cs 0x%x flags 0x%x\n",
@@ -549,15 +508,15 @@ int biosint(unsigned long intnumber,
printk_debug("biosint: gs 0x%x fs 0x%x ds 0x%x es 0x%x\n",
gsfs >> 16, gsfs & 0xffff, dses >> 16, dses & 0xffff);
- // cases in a good compiler are just as good as your own tables.
+ // cases in a good compiler are just as good as your own tables.
switch (intnumber) {
- case 0 ... 15:
+ case 0...15:
// These are not BIOS service, but the CPU-generated exceptions
printk_info("biosint: Oops, exception %u\n", intnumber);
if (esp < 0x1000) {
printk_debug("Stack contents: ");
while (esp < 0x1000) {
- printk_debug("0x%04x ", *(unsigned short *) esp);
+ printk_debug("0x%04x ", *(unsigned short *)esp);
esp += 2;
}
printk_debug("\n");
@@ -566,82 +525,78 @@ int biosint(unsigned long intnumber,
// "longjmp"
//vga_exit();
break;
-
+
case PCIBIOS:
- ret = pcibios( &edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
+ ret = pcibios(&edi, &esi, &ebp, &esp,
+ &ebx, &edx, &ecx, &eax, &flags);
break;
- case MEMSIZE:
- // who cares.
+ case MEMSIZE:
+ // who cares.
eax = 128 * 1024;
ret = 0;
break;
case 0x15:
- ret=handleint21( &edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
+ ret = handleint21(&edi, &esi, &ebp, &esp,
+ &ebx, &edx, &ecx, &eax, &flags);
break;
default:
- printk_info("BIOSINT: Unsupport int #0x%x\n",
- intnumber);
+ printk_info("BIOSINT: Unsupport int #0x%x\n", intnumber);
break;
}
if (ret)
- flags |= 1; // carry flags
+ flags |= 1; // carry flags
else
flags &= ~1;
stackflags = flags;
return ret;
-}
-
+}
-void setup_realmode_idt(void)
+void setup_realmode_idt(void)
{
extern unsigned char idthandle, end_idthandle;
extern unsigned char debughandle, end_debughandle;
int i;
- struct realidt *idts = (struct realidt *) 0;
+ struct realidt *idts = (struct realidt *)0;
int codesize = &end_idthandle - &idthandle;
unsigned char *intbyte, *codeptr;
-
+
// for each int, we create a customized little handler
- // that just pushes %ax, puts the int # in %al,
- // then calls the common interrupt handler.
- // this necessitated because intel didn't know much about
+ // that just pushes %ax, puts the int # in %al,
+ // then calls the common interrupt handler.
+ // this necessitated because intel didn't know much about
// architecture when they did the 8086 (it shows)
// (hmm do they know anymore even now :-)
- // obviously you can see I don't really care about memory
+ // obviously you can see I don't really care about memory
// efficiency. If I did I would probe back through the stack
// and get it that way. But that's really disgusting.
for (i = 0; i < 256; i++) {
idts[i].cs = 0;
- codeptr = (unsigned char*) 4096 + i * codesize;
- idts[i].offset = (unsigned) codeptr;
+ codeptr = (unsigned char *)4096 + i * codesize;
+ idts[i].offset = (unsigned)codeptr;
memcpy(codeptr, &idthandle, codesize);
intbyte = codeptr + 3;
*intbyte = i;
}
-
+
// fixed entry points
-
+
// VGA BIOSes tend to hardcode f000:f065 as the previous handler of
- // int10.
+ // int10.
// calling convention here is the same as INTs, we can reuse
// the int entry code.
- codeptr = (unsigned char*) 0xff065;
+ codeptr = (unsigned char *)0xff065;
memcpy(codeptr, &idthandle, codesize);
intbyte = codeptr + 3;
- *intbyte = 0x42; /* int42 is the relocated int10 */
+ *intbyte = 0x42; /* int42 is the relocated int10 */
/* debug handler - useful to set a programmable delay between instructions if the
TF bit is set upon call to real mode */
idts[1].cs = 0;
idts[1].offset = 16384;
- memcpy((void*)16384, &debughandle, &end_debughandle - &debughandle);
+ memcpy((void *)16384, &debughandle, &end_debughandle - &debughandle);
}
-
-
enum {
CHECK = 0xb001,
FINDDEV = 0xb102,
@@ -654,15 +609,15 @@ enum {
};
// errors go in AH. Just set these up so that word assigns
-// will work. KISS.
+// will work. KISS.
enum {
PCIBIOS_NODEV = 0x8600,
PCIBIOS_BADREG = 0x8700
};
int
-pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
+pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
+ unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
unsigned long *pecx, unsigned long *peax, unsigned long *pflags)
{
unsigned long edi = *pedi;
@@ -674,150 +629,153 @@ pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
unsigned long ecx = *pecx;
unsigned long eax = *peax;
unsigned long flags = *pflags;
- unsigned short func = (unsigned short) eax;
+ unsigned short func = (unsigned short)eax;
int retval = 0;
unsigned short devid, vendorid, devfn;
- short devindex; /* Use short to get rid of gabage in upper half of 32-bit register */
+ short devindex; /* Use short to get rid of gabage in upper half of 32-bit register */
unsigned char bus;
device_t dev;
-
- switch(func) {
- case CHECK:
+
+ switch (func) {
+ case CHECK:
*pedx = 0x4350;
*pecx = 0x2049;
retval = 0;
break;
case FINDDEV:
- {
- devid = *pecx;
- vendorid = *pedx;
- devindex = *pesi;
- dev = 0;
- while ((dev = dev_find_device(vendorid, devid, dev))) {
- if (devindex <= 0)
- break;
- devindex--;
- }
- if (dev) {
- unsigned short busdevfn;
- *peax = 0;
- // busnum is an unsigned char;
- // devfn is an int, so we mask it off.
- busdevfn = (dev->bus->secondary << 8)
- | (dev->path.u.pci.devfn & 0xff);
- printk_debug("0x%x: return 0x%x\n", func, busdevfn);
- *pebx = busdevfn;
- retval = 0;
- } else {
- *peax = PCIBIOS_NODEV;
- retval = -1;
+ {
+ devid = *pecx;
+ vendorid = *pedx;
+ devindex = *pesi;
+ dev = 0;
+ while ((dev = dev_find_device(vendorid, devid, dev))) {
+ if (devindex <= 0)
+ break;
+ devindex--;
+ }
+ if (dev) {
+ unsigned short busdevfn;
+ *peax = 0;
+ // busnum is an unsigned char;
+ // devfn is an int, so we mask it off.
+ busdevfn = (dev->bus->secondary << 8)
+ | (dev->path.u.pci.devfn & 0xff);
+ printk_debug("0x%x: return 0x%x\n", func,
+ busdevfn);
+ *pebx = busdevfn;
+ retval = 0;
+ } else {
+ *peax = PCIBIOS_NODEV;
+ retval = -1;
+ }
}
- }
- break;
+ break;
case READCONFDWORD:
case READCONFWORD:
case READCONFBYTE:
case WRITECONFDWORD:
case WRITECONFWORD:
case WRITECONFBYTE:
- {
- unsigned long dword;
- unsigned short word;
- unsigned char byte;
- unsigned char reg;
-
- devfn = *pebx & 0xff;
- bus = *pebx >> 8;
- reg = *pedi;
- dev = dev_find_slot(bus, devfn);
- if (! dev) {
- printk_debug("0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn);
- // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn!
- *peax = PCIBIOS_BADREG;
- retval = -1;
- }
- switch(func) {
- case READCONFBYTE:
- byte = pci_read_config8(dev, reg);
- *pecx = byte;
- break;
- case READCONFWORD:
- word = pci_read_config16(dev, reg);
- *pecx = word;
- break;
- case READCONFDWORD:
- dword = pci_read_config32(dev, reg);
- *pecx = dword;
- break;
- case WRITECONFBYTE:
- byte = *pecx;
- pci_write_config8(dev, reg, byte);
- break;
- case WRITECONFWORD:
- word = *pecx;
- pci_write_config16(dev, reg, word);
- break;
- case WRITECONFDWORD:
- dword = *pecx;
- pci_write_config32(dev, reg, dword);
- break;
- }
-
- if (retval)
- retval = PCIBIOS_BADREG;
- printk_debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
+ {
+ unsigned long dword;
+ unsigned short word;
+ unsigned char byte;
+ unsigned char reg;
+
+ devfn = *pebx & 0xff;
+ bus = *pebx >> 8;
+ reg = *pedi;
+ dev = dev_find_slot(bus, devfn);
+ if (!dev) {
+ printk_debug
+ ("0x%x: BAD DEVICE bus %d devfn 0x%x\n",
+ func, bus, devfn);
+ // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn!
+ *peax = PCIBIOS_BADREG;
+ retval = -1;
+ }
+ switch (func) {
+ case READCONFBYTE:
+ byte = pci_read_config8(dev, reg);
+ *pecx = byte;
+ break;
+ case READCONFWORD:
+ word = pci_read_config16(dev, reg);
+ *pecx = word;
+ break;
+ case READCONFDWORD:
+ dword = pci_read_config32(dev, reg);
+ *pecx = dword;
+ break;
+ case WRITECONFBYTE:
+ byte = *pecx;
+ pci_write_config8(dev, reg, byte);
+ break;
+ case WRITECONFWORD:
+ word = *pecx;
+ pci_write_config16(dev, reg, word);
+ break;
+ case WRITECONFDWORD:
+ dword = *pecx;
+ pci_write_config32(dev, reg, dword);
+ break;
+ }
+
+ if (retval)
+ retval = PCIBIOS_BADREG;
+ printk_debug
+ ("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
func, bus, devfn, reg, *pecx);
- *peax = 0;
- retval = 0;
- }
- break;
+ *peax = 0;
+ retval = 0;
+ }
+ break;
default:
- printk_err("UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func);
+ printk_err("UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func);
break;
}
-
+
return retval;
-}
+}
int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp,
unsigned long *esp, unsigned long *ebx, unsigned long *edx,
unsigned long *ecx, unsigned long *eax, unsigned long *flags)
{
- int res=-1;
+ int res = -1;
printk_debug("handleint21, eax 0x%x\n", *eax);
- switch(*eax&0xffff)
- {
+ switch (*eax & 0xffff) {
case 0x5f19:
break;
case 0x5f18:
- *eax=0x5f;
- *ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
- *ecx=0x060;
- res=0;
+ *eax = 0x5f;
+ *ebx = 0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
+ *ecx = 0x060;
+ res = 0;
break;
case 0x5f00:
*eax = 0x8600;
break;
case 0x5f01:
*eax = 0x5f;
- *ecx = (*ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
+ *ecx = (*ecx & 0xffffff00) | 2; // panel type = 2 = 1024 * 768
res = 0;
break;
case 0x5f02:
- *eax=0x5f;
- *ebx= (*ebx & 0xffff0000) | 2;
- *ecx= (*ecx & 0xffff0000) | 0x401; // PAL + crt only
- *edx= (*edx & 0xffff0000) | 0; // TV Layout - default
- res=0;
+ *eax = 0x5f;
+ *ebx = (*ebx & 0xffff0000) | 2;
+ *ecx = (*ecx & 0xffff0000) | 0x401; // PAL + crt only
+ *edx = (*edx & 0xffff0000) | 0; // TV Layout - default
+ res = 0;
break;
case 0x5f0f:
- *eax=0x860f;
+ *eax = 0x860f;
break;
case 0xBEA7:
- *eax=66;
+ *eax = 66;
break;
case 0xBEA4:
- *eax=500;
+ *eax = 500;
break;
}
return res;
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-30 14:01:44 +0000