Update pc98 memory probe functions.

- pc98_getmemsize() function returns available memory size under 16MB.
 - getmemsize() function is merged from PC-AT's one.

Submitted by:	chi@bd.mbn.or.jp (Chiharu Shibata) and
		NOKUBI Hirotaka <nokubi@ff.iij4u.or.jp>
This commit is contained in:
Yoshihiro Takahashi 2001-05-21 12:51:44 +00:00
parent 7ec00975de
commit bd0432d8b0
4 changed files with 82 additions and 572 deletions

View File

@ -1451,92 +1451,26 @@ sdtossd(sd, ssd)
* Total memory size may be set by the kernel environment variable
* hw.physmem or the compile-time define MAXMEM.
*/
#ifdef PC98
static void
getmemsize(int first)
{
u_int biosbasemem, biosextmem;
u_int pagesinbase, pagesinext;
int pa_indx;
int pg_n;
int speculative_mprobe;
#ifdef DEV_NPX
int msize;
#endif
unsigned under16;
vm_offset_t target_page;
pc98_getmemsize(&biosbasemem, &biosextmem, &under16);
#ifdef SMP
/* make hole for AP bootstrap code */
pagesinbase = mp_bootaddress(biosbasemem) / PAGE_SIZE;
int i, physmap_idx, pa_indx;
u_int basemem, extmem;
#ifdef PC98
int pg_n;
u_int under16;
#else
pagesinbase = biosbasemem * 1024 / PAGE_SIZE;
struct vm86frame vmf;
struct vm86context vmc;
#endif
pagesinext = biosextmem * 1024 / PAGE_SIZE;
Maxmem_under16M = under16 * 1024 / PAGE_SIZE;
#ifndef MAXMEM
/*
* Maxmem isn't the "maximum memory", it's one larger than the
* highest page of the physical address space. It should be
* called something like "Maxphyspage".
*/
Maxmem = pagesinext + 0x100000/PAGE_SIZE;
/*
* Indicate that we wish to do a speculative search for memory beyond
* the end of the reported size if the indicated amount is 64MB (0x4000
* pages) - which is the largest amount that the BIOS/bootblocks can
* currently report. If a specific amount of memory is indicated via
* the MAXMEM option or the npx0 "msize", then don't do the speculative
* memory probe.
*/
if (Maxmem >= 0x4000)
speculative_mprobe = TRUE;
else
speculative_mprobe = FALSE;
#else
Maxmem = MAXMEM/4;
speculative_mprobe = FALSE;
vm_offset_t pa, physmap[PHYSMAP_SIZE];
pt_entry_t pte;
const char *cp;
#ifndef PC98
struct bios_smap *smap;
#endif
#ifdef DEV_NPX
if (resource_int_value("npx", 0, "msize", &msize) == 0) {
if (msize != 0) {
Maxmem = msize / 4;
speculative_mprobe = FALSE;
}
}
#endif
#ifdef SMP
/* look for the MP hardware - needed for apic addresses */
mp_probe();
#endif
/* call pmap initialization to make new kernel address space */
pmap_bootstrap (first, 0);
/*
* Size up each available chunk of physical memory.
*/
/*
* We currently don't bother testing base memory.
* XXX ...but we probably should.
*/
pa_indx = 0;
if (pagesinbase > 1) {
phys_avail[pa_indx++] = PAGE_SIZE; /* skip first page of memory */
phys_avail[pa_indx] = ptoa(pagesinbase);/* memory up to the ISA hole */
physmem = pagesinbase - 1;
} else {
/* point at first chunk end */
pa_indx++;
}
#ifdef PC98
/* XXX - some of EPSON machines can't use PG_N */
pg_n = PG_N;
if (pc98_machine_type & M_EPSON_PC98) {
@ -1551,214 +1485,20 @@ getmemsize(int first)
break;
}
}
speculative_mprobe = FALSE;
#ifdef notdef /* XXX - see below */
/*
* Certain 'CPU accelerator' supports over 16MB memory on the machines
* whose BIOS doesn't store true size.
* To support this, we don't trust BIOS values if Maxmem <= 16MB (0x1000
* pages) - which is the largest amount that the OLD PC-98 can report.
*
* OK: PC-9801NS/R(9.6M)
* OK: PC-9801DA(5.6M)+EUD-H(32M)+Cyrix 5x86
* OK: PC-9821Ap(14.6M)+EUA-T(8M)+Cyrix 5x86-100
* NG: PC-9821Ap(14.6M)+EUA-T(8M)+AMD DX4-100 -> freeze
*/
if (Maxmem <= 0x1000) {
int tmp, page_bad;
page_bad = FALSE;
/*
* For Max14.6MB machines, the 0x10f0 page is same as 0x00f0,
* which is BIOS ROM, by overlapping.
* So, we check that page's ability of writing.
*/
target_page = ptoa(0x10f0);
/*
* map page into kernel: valid, read/write, non-cacheable
*/
*(int *)CMAP1 = PG_V | PG_RW | pg_n | target_page;
invltlb();
tmp = *(int *)CADDR1;
/*
* Test for alternating 1's and 0's
*/
*(volatile int *)CADDR1 = 0xaaaaaaaa;
if (*(volatile int *)CADDR1 != 0xaaaaaaaa)
page_bad = TRUE;
/*
* Test for alternating 0's and 1's
*/
*(volatile int *)CADDR1 = 0x55555555;
if (*(volatile int *)CADDR1 != 0x55555555)
page_bad = TRUE;
/*
* Test for all 1's
*/
*(volatile int *)CADDR1 = 0xffffffff;
if (*(volatile int *)CADDR1 != 0xffffffff)
page_bad = TRUE;
/*
* Test for all 0's
*/
*(volatile int *)CADDR1 = 0x0;
if (*(volatile int *)CADDR1 != 0x0) {
/*
* test of page failed
*/
page_bad = TRUE;
}
/*
* Restore original value.
*/
*(int *)CADDR1 = tmp;
/*
* Adjust Maxmem if valid/good page.
*/
if (page_bad == FALSE) {
/* '+ 2' is needed to make speculative_mprobe sure */
Maxmem = 0x1000 + 2;
speculative_mprobe = TRUE;
}
}
#endif
for (target_page = avail_start; target_page < ptoa(Maxmem); target_page += PAGE_SIZE) {
int tmp, page_bad;
page_bad = FALSE;
/* skip system area */
if (target_page >= ptoa(Maxmem_under16M) &&
target_page < ptoa(4096))
continue;
/*
* map page into kernel: valid, read/write, non-cacheable
*/
*(int *)CMAP1 = PG_V | PG_RW | pg_n | target_page;
invltlb();
tmp = *(int *)CADDR1;
/*
* Test for alternating 1's and 0's
*/
*(volatile int *)CADDR1 = 0xaaaaaaaa;
if (*(volatile int *)CADDR1 != 0xaaaaaaaa) {
page_bad = TRUE;
}
/*
* Test for alternating 0's and 1's
*/
*(volatile int *)CADDR1 = 0x55555555;
if (*(volatile int *)CADDR1 != 0x55555555) {
page_bad = TRUE;
}
/*
* Test for all 1's
*/
*(volatile int *)CADDR1 = 0xffffffff;
if (*(volatile int *)CADDR1 != 0xffffffff) {
page_bad = TRUE;
}
/*
* Test for all 0's
*/
*(volatile int *)CADDR1 = 0x0;
if (*(volatile int *)CADDR1 != 0x0) {
/*
* test of page failed
*/
page_bad = TRUE;
}
/*
* Restore original value.
*/
*(int *)CADDR1 = tmp;
/*
* Adjust array of valid/good pages.
*/
if (page_bad == FALSE) {
/*
* If this good page is a continuation of the
* previous set of good pages, then just increase
* the end pointer. Otherwise start a new chunk.
* Note that "end" points one higher than end,
* making the range >= start and < end.
* If we're also doing a speculative memory
* test and we at or past the end, bump up Maxmem
* so that we keep going. The first bad page
* will terminate the loop.
*/
if (phys_avail[pa_indx] == target_page) {
phys_avail[pa_indx] += PAGE_SIZE;
if (speculative_mprobe == TRUE &&
phys_avail[pa_indx] >= (16*1024*1024))
Maxmem++;
} else {
pa_indx++;
if (pa_indx == PHYS_AVAIL_ARRAY_END) {
printf("Too many holes in the physical address space, giving up\n");
pa_indx--;
break;
}
phys_avail[pa_indx++] = target_page; /* start */
phys_avail[pa_indx] = target_page + PAGE_SIZE; /* end */
}
physmem++;
}
}
*(int *)CMAP1 = 0;
invltlb();
/*
* XXX
* The last chunk must contain at least one page plus the message
* buffer to avoid complicating other code (message buffer address
* calculation, etc.).
*/
while (phys_avail[pa_indx - 1] + PAGE_SIZE +
round_page(MSGBUF_SIZE) >= phys_avail[pa_indx]) {
physmem -= atop(phys_avail[pa_indx] - phys_avail[pa_indx - 1]);
phys_avail[pa_indx--] = 0;
phys_avail[pa_indx--] = 0;
}
Maxmem = atop(phys_avail[pa_indx]);
/* Trim off space for the message buffer. */
phys_avail[pa_indx] -= round_page(MSGBUF_SIZE);
avail_end = phys_avail[pa_indx];
}
#else
static void
getmemsize(int first)
{
int i, physmap_idx, pa_indx;
u_int basemem, extmem;
struct vm86frame vmf;
struct vm86context vmc;
vm_offset_t pa, physmap[PHYSMAP_SIZE];
pt_entry_t pte;
const char *cp;
struct bios_smap *smap;
bzero(&vmf, sizeof(struct vm86frame));
#endif
bzero(physmap, sizeof(physmap));
/*
* Perform "base memory" related probes & setup
*/
#ifdef PC98
under16 = pc98_getmemsize(&basemem, &extmem);
#else
vm86_intcall(0x12, &vmf);
basemem = vmf.vmf_ax;
#endif
if (basemem > 640) {
printf("Preposterous BIOS basemem of %uK, truncating to 640K\n",
basemem);
@ -1806,6 +1546,7 @@ getmemsize(int first)
pte = (pt_entry_t)vtopte(KERNBASE + (1 << PAGE_SHIFT));
*pte = (1 << PAGE_SHIFT) | PG_RW | PG_V;
#ifndef PC98
/*
* get memory map with INT 15:E820
*/
@ -1901,6 +1642,7 @@ getmemsize(int first)
*/
if ((extmem > 15 * 1024) && (extmem < 16 * 1024))
extmem = 15 * 1024;
#endif
physmap[0] = 0;
physmap[1] = basemem * 1024;
@ -1908,7 +1650,17 @@ getmemsize(int first)
physmap[physmap_idx] = 0x100000;
physmap[physmap_idx + 1] = physmap[physmap_idx] + extmem * 1024;
#ifdef PC98
if ((under16 != 16 * 1024) && (extmem > 15 * 1024)) {
/* 15M - 16M region is cut off, so need to divide chunk */
physmap[physmap_idx + 1] = under16 * 1024;
physmap_idx += 2;
physmap[physmap_idx] = 0x1000000;
physmap[physmap_idx + 1] = physmap[2] + extmem * 1024;
}
#else
physmap_done:
#endif
/*
* Now, physmap contains a map of physical memory.
*/
@ -1934,7 +1686,7 @@ getmemsize(int first)
#endif
/*
* hw.maxmem is a size in bytes; we also allow k, m, and g suffixes
* hw.physmem is a size in bytes; we also allow k, m, and g suffixes
* for the appropriate modifiers. This overrides MAXMEM.
*/
if ((cp = getenv("hw.physmem")) != NULL) {
@ -2022,7 +1774,11 @@ getmemsize(int first)
/*
* map page into kernel: valid, read/write,non-cacheable
*/
#ifdef PC98
*pte = pa | PG_V | PG_RW | pg_n;
#else
*pte = pa | PG_V | PG_RW | PG_N;
#endif
invltlb();
tmp = *(int *)ptr;
@ -2114,7 +1870,6 @@ getmemsize(int first)
avail_end = phys_avail[pa_indx];
}
#endif
void
init386(first)

View File

@ -1451,92 +1451,26 @@ sdtossd(sd, ssd)
* Total memory size may be set by the kernel environment variable
* hw.physmem or the compile-time define MAXMEM.
*/
#ifdef PC98
static void
getmemsize(int first)
{
u_int biosbasemem, biosextmem;
u_int pagesinbase, pagesinext;
int pa_indx;
int pg_n;
int speculative_mprobe;
#ifdef DEV_NPX
int msize;
#endif
unsigned under16;
vm_offset_t target_page;
pc98_getmemsize(&biosbasemem, &biosextmem, &under16);
#ifdef SMP
/* make hole for AP bootstrap code */
pagesinbase = mp_bootaddress(biosbasemem) / PAGE_SIZE;
int i, physmap_idx, pa_indx;
u_int basemem, extmem;
#ifdef PC98
int pg_n;
u_int under16;
#else
pagesinbase = biosbasemem * 1024 / PAGE_SIZE;
struct vm86frame vmf;
struct vm86context vmc;
#endif
pagesinext = biosextmem * 1024 / PAGE_SIZE;
Maxmem_under16M = under16 * 1024 / PAGE_SIZE;
#ifndef MAXMEM
/*
* Maxmem isn't the "maximum memory", it's one larger than the
* highest page of the physical address space. It should be
* called something like "Maxphyspage".
*/
Maxmem = pagesinext + 0x100000/PAGE_SIZE;
/*
* Indicate that we wish to do a speculative search for memory beyond
* the end of the reported size if the indicated amount is 64MB (0x4000
* pages) - which is the largest amount that the BIOS/bootblocks can
* currently report. If a specific amount of memory is indicated via
* the MAXMEM option or the npx0 "msize", then don't do the speculative
* memory probe.
*/
if (Maxmem >= 0x4000)
speculative_mprobe = TRUE;
else
speculative_mprobe = FALSE;
#else
Maxmem = MAXMEM/4;
speculative_mprobe = FALSE;
vm_offset_t pa, physmap[PHYSMAP_SIZE];
pt_entry_t pte;
const char *cp;
#ifndef PC98
struct bios_smap *smap;
#endif
#ifdef DEV_NPX
if (resource_int_value("npx", 0, "msize", &msize) == 0) {
if (msize != 0) {
Maxmem = msize / 4;
speculative_mprobe = FALSE;
}
}
#endif
#ifdef SMP
/* look for the MP hardware - needed for apic addresses */
mp_probe();
#endif
/* call pmap initialization to make new kernel address space */
pmap_bootstrap (first, 0);
/*
* Size up each available chunk of physical memory.
*/
/*
* We currently don't bother testing base memory.
* XXX ...but we probably should.
*/
pa_indx = 0;
if (pagesinbase > 1) {
phys_avail[pa_indx++] = PAGE_SIZE; /* skip first page of memory */
phys_avail[pa_indx] = ptoa(pagesinbase);/* memory up to the ISA hole */
physmem = pagesinbase - 1;
} else {
/* point at first chunk end */
pa_indx++;
}
#ifdef PC98
/* XXX - some of EPSON machines can't use PG_N */
pg_n = PG_N;
if (pc98_machine_type & M_EPSON_PC98) {
@ -1551,214 +1485,20 @@ getmemsize(int first)
break;
}
}
speculative_mprobe = FALSE;
#ifdef notdef /* XXX - see below */
/*
* Certain 'CPU accelerator' supports over 16MB memory on the machines
* whose BIOS doesn't store true size.
* To support this, we don't trust BIOS values if Maxmem <= 16MB (0x1000
* pages) - which is the largest amount that the OLD PC-98 can report.
*
* OK: PC-9801NS/R(9.6M)
* OK: PC-9801DA(5.6M)+EUD-H(32M)+Cyrix 5x86
* OK: PC-9821Ap(14.6M)+EUA-T(8M)+Cyrix 5x86-100
* NG: PC-9821Ap(14.6M)+EUA-T(8M)+AMD DX4-100 -> freeze
*/
if (Maxmem <= 0x1000) {
int tmp, page_bad;
page_bad = FALSE;
/*
* For Max14.6MB machines, the 0x10f0 page is same as 0x00f0,
* which is BIOS ROM, by overlapping.
* So, we check that page's ability of writing.
*/
target_page = ptoa(0x10f0);
/*
* map page into kernel: valid, read/write, non-cacheable
*/
*(int *)CMAP1 = PG_V | PG_RW | pg_n | target_page;
invltlb();
tmp = *(int *)CADDR1;
/*
* Test for alternating 1's and 0's
*/
*(volatile int *)CADDR1 = 0xaaaaaaaa;
if (*(volatile int *)CADDR1 != 0xaaaaaaaa)
page_bad = TRUE;
/*
* Test for alternating 0's and 1's
*/
*(volatile int *)CADDR1 = 0x55555555;
if (*(volatile int *)CADDR1 != 0x55555555)
page_bad = TRUE;
/*
* Test for all 1's
*/
*(volatile int *)CADDR1 = 0xffffffff;
if (*(volatile int *)CADDR1 != 0xffffffff)
page_bad = TRUE;
/*
* Test for all 0's
*/
*(volatile int *)CADDR1 = 0x0;
if (*(volatile int *)CADDR1 != 0x0) {
/*
* test of page failed
*/
page_bad = TRUE;
}
/*
* Restore original value.
*/
*(int *)CADDR1 = tmp;
/*
* Adjust Maxmem if valid/good page.
*/
if (page_bad == FALSE) {
/* '+ 2' is needed to make speculative_mprobe sure */
Maxmem = 0x1000 + 2;
speculative_mprobe = TRUE;
}
}
#endif
for (target_page = avail_start; target_page < ptoa(Maxmem); target_page += PAGE_SIZE) {
int tmp, page_bad;
page_bad = FALSE;
/* skip system area */
if (target_page >= ptoa(Maxmem_under16M) &&
target_page < ptoa(4096))
continue;
/*
* map page into kernel: valid, read/write, non-cacheable
*/
*(int *)CMAP1 = PG_V | PG_RW | pg_n | target_page;
invltlb();
tmp = *(int *)CADDR1;
/*
* Test for alternating 1's and 0's
*/
*(volatile int *)CADDR1 = 0xaaaaaaaa;
if (*(volatile int *)CADDR1 != 0xaaaaaaaa) {
page_bad = TRUE;
}
/*
* Test for alternating 0's and 1's
*/
*(volatile int *)CADDR1 = 0x55555555;
if (*(volatile int *)CADDR1 != 0x55555555) {
page_bad = TRUE;
}
/*
* Test for all 1's
*/
*(volatile int *)CADDR1 = 0xffffffff;
if (*(volatile int *)CADDR1 != 0xffffffff) {
page_bad = TRUE;
}
/*
* Test for all 0's
*/
*(volatile int *)CADDR1 = 0x0;
if (*(volatile int *)CADDR1 != 0x0) {
/*
* test of page failed
*/
page_bad = TRUE;
}
/*
* Restore original value.
*/
*(int *)CADDR1 = tmp;
/*
* Adjust array of valid/good pages.
*/
if (page_bad == FALSE) {
/*
* If this good page is a continuation of the
* previous set of good pages, then just increase
* the end pointer. Otherwise start a new chunk.
* Note that "end" points one higher than end,
* making the range >= start and < end.
* If we're also doing a speculative memory
* test and we at or past the end, bump up Maxmem
* so that we keep going. The first bad page
* will terminate the loop.
*/
if (phys_avail[pa_indx] == target_page) {
phys_avail[pa_indx] += PAGE_SIZE;
if (speculative_mprobe == TRUE &&
phys_avail[pa_indx] >= (16*1024*1024))
Maxmem++;
} else {
pa_indx++;
if (pa_indx == PHYS_AVAIL_ARRAY_END) {
printf("Too many holes in the physical address space, giving up\n");
pa_indx--;
break;
}
phys_avail[pa_indx++] = target_page; /* start */
phys_avail[pa_indx] = target_page + PAGE_SIZE; /* end */
}
physmem++;
}
}
*(int *)CMAP1 = 0;
invltlb();
/*
* XXX
* The last chunk must contain at least one page plus the message
* buffer to avoid complicating other code (message buffer address
* calculation, etc.).
*/
while (phys_avail[pa_indx - 1] + PAGE_SIZE +
round_page(MSGBUF_SIZE) >= phys_avail[pa_indx]) {
physmem -= atop(phys_avail[pa_indx] - phys_avail[pa_indx - 1]);
phys_avail[pa_indx--] = 0;
phys_avail[pa_indx--] = 0;
}
Maxmem = atop(phys_avail[pa_indx]);
/* Trim off space for the message buffer. */
phys_avail[pa_indx] -= round_page(MSGBUF_SIZE);
avail_end = phys_avail[pa_indx];
}
#else
static void
getmemsize(int first)
{
int i, physmap_idx, pa_indx;
u_int basemem, extmem;
struct vm86frame vmf;
struct vm86context vmc;
vm_offset_t pa, physmap[PHYSMAP_SIZE];
pt_entry_t pte;
const char *cp;
struct bios_smap *smap;
bzero(&vmf, sizeof(struct vm86frame));
#endif
bzero(physmap, sizeof(physmap));
/*
* Perform "base memory" related probes & setup
*/
#ifdef PC98
under16 = pc98_getmemsize(&basemem, &extmem);
#else
vm86_intcall(0x12, &vmf);
basemem = vmf.vmf_ax;
#endif
if (basemem > 640) {
printf("Preposterous BIOS basemem of %uK, truncating to 640K\n",
basemem);
@ -1806,6 +1546,7 @@ getmemsize(int first)
pte = (pt_entry_t)vtopte(KERNBASE + (1 << PAGE_SHIFT));
*pte = (1 << PAGE_SHIFT) | PG_RW | PG_V;
#ifndef PC98
/*
* get memory map with INT 15:E820
*/
@ -1901,6 +1642,7 @@ getmemsize(int first)
*/
if ((extmem > 15 * 1024) && (extmem < 16 * 1024))
extmem = 15 * 1024;
#endif
physmap[0] = 0;
physmap[1] = basemem * 1024;
@ -1908,7 +1650,17 @@ getmemsize(int first)
physmap[physmap_idx] = 0x100000;
physmap[physmap_idx + 1] = physmap[physmap_idx] + extmem * 1024;
#ifdef PC98
if ((under16 != 16 * 1024) && (extmem > 15 * 1024)) {
/* 15M - 16M region is cut off, so need to divide chunk */
physmap[physmap_idx + 1] = under16 * 1024;
physmap_idx += 2;
physmap[physmap_idx] = 0x1000000;
physmap[physmap_idx + 1] = physmap[2] + extmem * 1024;
}
#else
physmap_done:
#endif
/*
* Now, physmap contains a map of physical memory.
*/
@ -1934,7 +1686,7 @@ getmemsize(int first)
#endif
/*
* hw.maxmem is a size in bytes; we also allow k, m, and g suffixes
* hw.physmem is a size in bytes; we also allow k, m, and g suffixes
* for the appropriate modifiers. This overrides MAXMEM.
*/
if ((cp = getenv("hw.physmem")) != NULL) {
@ -2022,7 +1774,11 @@ getmemsize(int first)
/*
* map page into kernel: valid, read/write,non-cacheable
*/
#ifdef PC98
*pte = pa | PG_V | PG_RW | pg_n;
#else
*pte = pa | PG_V | PG_RW | PG_N;
#endif
invltlb();
tmp = *(int *)ptr;
@ -2114,7 +1870,6 @@ getmemsize(int first)
avail_end = phys_avail[pa_indx];
}
#endif
void
init386(first)

View File

@ -58,8 +58,6 @@ pc98_init_dmac(void)
}
#ifdef EPSON_MEMWIN
static void init_epson_memwin __P((void));
/*
* Disconnect phisical memory in 15-16MB region.
*
@ -119,21 +117,21 @@ init_epson_memwin(void)
/*
* Get physical memory size
*/
void
pc98_getmemsize(unsigned *base, unsigned *ext, unsigned *under16)
unsigned int
pc98_getmemsize(unsigned int *base, unsigned int *ext)
{
unsigned int over16;
unsigned int under16, over16;
/* available conventional memory size */
*base = ((PC98_SYSTEM_PARAMETER(0x501) & 7) + 1) * 128;
/* available protected memory size under 16MB */
*under16 = PC98_SYSTEM_PARAMETER(0x401) * 128 + 1024;
under16 = PC98_SYSTEM_PARAMETER(0x401) * 128 + 1024;
#ifdef EPSON_MEMWIN
if (pc98_machine_type & M_EPSON_PC98) {
if (*under16 > (15 * 1024)) {
if (under16 > (15 * 1024)) {
/* chop under16 memory to 15MB */
*under16 = 15 * 1024;
under16 = 15 * 1024;
}
init_epson_memwin();
}
@ -143,11 +141,13 @@ pc98_getmemsize(unsigned *base, unsigned *ext, unsigned *under16)
over16 = PC98_SYSTEM_PARAMETER(0x594);
over16 += PC98_SYSTEM_PARAMETER(0x595) * 256;
*ext = *under16;
if (over16 > 0) {
*ext = (16 + over16) * 1024;
*ext = (16 + over16) * 1024 - 1024;
} else {
*ext = under16 - 1024;
}
*ext -= 1024; /* subtract base memory space */
return under16;
}
/*

View File

@ -31,7 +31,7 @@
#define __PC98_PC98_PC98_MACHDEP_H__
void pc98_init_dmac __P((void));
void pc98_getmemsize __P((unsigned *, unsigned *, unsigned *));
unsigned int pc98_getmemsize __P((unsigned *, unsigned *));
struct ccb_calc_geometry;
int scsi_da_bios_params __P((struct ccb_calc_geometry *));