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https://github.com/freebsd/freebsd-src
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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
parent
7ec00975de
commit
bd0432d8b0
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=76931
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@ -1451,92 +1451,26 @@ sdtossd(sd, ssd)
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* Total memory size may be set by the kernel environment variable
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* hw.physmem or the compile-time define MAXMEM.
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*/
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#ifdef PC98
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static void
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getmemsize(int first)
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{
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u_int biosbasemem, biosextmem;
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u_int pagesinbase, pagesinext;
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int pa_indx;
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int pg_n;
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int speculative_mprobe;
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#ifdef DEV_NPX
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int msize;
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#endif
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unsigned under16;
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vm_offset_t target_page;
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pc98_getmemsize(&biosbasemem, &biosextmem, &under16);
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#ifdef SMP
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/* make hole for AP bootstrap code */
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pagesinbase = mp_bootaddress(biosbasemem) / PAGE_SIZE;
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int i, physmap_idx, pa_indx;
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u_int basemem, extmem;
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#ifdef PC98
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int pg_n;
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u_int under16;
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#else
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pagesinbase = biosbasemem * 1024 / PAGE_SIZE;
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struct vm86frame vmf;
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struct vm86context vmc;
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#endif
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pagesinext = biosextmem * 1024 / PAGE_SIZE;
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Maxmem_under16M = under16 * 1024 / PAGE_SIZE;
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#ifndef MAXMEM
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/*
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* Maxmem isn't the "maximum memory", it's one larger than the
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* highest page of the physical address space. It should be
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* called something like "Maxphyspage".
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*/
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Maxmem = pagesinext + 0x100000/PAGE_SIZE;
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/*
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* Indicate that we wish to do a speculative search for memory beyond
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* the end of the reported size if the indicated amount is 64MB (0x4000
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* pages) - which is the largest amount that the BIOS/bootblocks can
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* currently report. If a specific amount of memory is indicated via
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* the MAXMEM option or the npx0 "msize", then don't do the speculative
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* memory probe.
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*/
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if (Maxmem >= 0x4000)
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speculative_mprobe = TRUE;
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else
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speculative_mprobe = FALSE;
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#else
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Maxmem = MAXMEM/4;
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speculative_mprobe = FALSE;
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vm_offset_t pa, physmap[PHYSMAP_SIZE];
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pt_entry_t pte;
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const char *cp;
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#ifndef PC98
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struct bios_smap *smap;
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#endif
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#ifdef DEV_NPX
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if (resource_int_value("npx", 0, "msize", &msize) == 0) {
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if (msize != 0) {
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Maxmem = msize / 4;
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speculative_mprobe = FALSE;
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}
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}
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#endif
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#ifdef SMP
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/* look for the MP hardware - needed for apic addresses */
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mp_probe();
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#endif
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/* call pmap initialization to make new kernel address space */
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pmap_bootstrap (first, 0);
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/*
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* Size up each available chunk of physical memory.
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*/
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/*
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* We currently don't bother testing base memory.
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* XXX ...but we probably should.
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*/
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pa_indx = 0;
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if (pagesinbase > 1) {
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phys_avail[pa_indx++] = PAGE_SIZE; /* skip first page of memory */
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phys_avail[pa_indx] = ptoa(pagesinbase);/* memory up to the ISA hole */
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physmem = pagesinbase - 1;
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} else {
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/* point at first chunk end */
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pa_indx++;
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}
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#ifdef PC98
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/* XXX - some of EPSON machines can't use PG_N */
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pg_n = PG_N;
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if (pc98_machine_type & M_EPSON_PC98) {
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@ -1551,214 +1485,20 @@ getmemsize(int first)
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break;
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}
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}
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speculative_mprobe = FALSE;
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#ifdef notdef /* XXX - see below */
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/*
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* Certain 'CPU accelerator' supports over 16MB memory on the machines
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* whose BIOS doesn't store true size.
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* To support this, we don't trust BIOS values if Maxmem <= 16MB (0x1000
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* pages) - which is the largest amount that the OLD PC-98 can report.
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*
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* OK: PC-9801NS/R(9.6M)
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* OK: PC-9801DA(5.6M)+EUD-H(32M)+Cyrix 5x86
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* OK: PC-9821Ap(14.6M)+EUA-T(8M)+Cyrix 5x86-100
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* NG: PC-9821Ap(14.6M)+EUA-T(8M)+AMD DX4-100 -> freeze
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*/
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if (Maxmem <= 0x1000) {
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int tmp, page_bad;
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page_bad = FALSE;
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/*
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* For Max14.6MB machines, the 0x10f0 page is same as 0x00f0,
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* which is BIOS ROM, by overlapping.
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* So, we check that page's ability of writing.
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*/
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target_page = ptoa(0x10f0);
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/*
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* map page into kernel: valid, read/write, non-cacheable
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*/
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*(int *)CMAP1 = PG_V | PG_RW | pg_n | target_page;
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invltlb();
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tmp = *(int *)CADDR1;
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/*
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* Test for alternating 1's and 0's
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*/
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*(volatile int *)CADDR1 = 0xaaaaaaaa;
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if (*(volatile int *)CADDR1 != 0xaaaaaaaa)
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page_bad = TRUE;
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/*
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* Test for alternating 0's and 1's
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*/
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*(volatile int *)CADDR1 = 0x55555555;
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if (*(volatile int *)CADDR1 != 0x55555555)
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page_bad = TRUE;
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/*
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* Test for all 1's
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*/
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*(volatile int *)CADDR1 = 0xffffffff;
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if (*(volatile int *)CADDR1 != 0xffffffff)
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page_bad = TRUE;
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/*
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* Test for all 0's
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*/
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*(volatile int *)CADDR1 = 0x0;
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if (*(volatile int *)CADDR1 != 0x0) {
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/*
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* test of page failed
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*/
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page_bad = TRUE;
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}
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/*
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* Restore original value.
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*/
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*(int *)CADDR1 = tmp;
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/*
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* Adjust Maxmem if valid/good page.
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*/
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if (page_bad == FALSE) {
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/* '+ 2' is needed to make speculative_mprobe sure */
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Maxmem = 0x1000 + 2;
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speculative_mprobe = TRUE;
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}
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}
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#endif
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for (target_page = avail_start; target_page < ptoa(Maxmem); target_page += PAGE_SIZE) {
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int tmp, page_bad;
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page_bad = FALSE;
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/* skip system area */
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if (target_page >= ptoa(Maxmem_under16M) &&
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target_page < ptoa(4096))
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continue;
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/*
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* map page into kernel: valid, read/write, non-cacheable
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*/
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*(int *)CMAP1 = PG_V | PG_RW | pg_n | target_page;
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invltlb();
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tmp = *(int *)CADDR1;
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/*
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* Test for alternating 1's and 0's
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*/
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*(volatile int *)CADDR1 = 0xaaaaaaaa;
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if (*(volatile int *)CADDR1 != 0xaaaaaaaa) {
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page_bad = TRUE;
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}
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/*
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* Test for alternating 0's and 1's
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*/
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*(volatile int *)CADDR1 = 0x55555555;
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if (*(volatile int *)CADDR1 != 0x55555555) {
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page_bad = TRUE;
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}
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/*
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* Test for all 1's
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*/
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*(volatile int *)CADDR1 = 0xffffffff;
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if (*(volatile int *)CADDR1 != 0xffffffff) {
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page_bad = TRUE;
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}
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/*
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* Test for all 0's
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*/
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*(volatile int *)CADDR1 = 0x0;
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if (*(volatile int *)CADDR1 != 0x0) {
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/*
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* test of page failed
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*/
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page_bad = TRUE;
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}
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/*
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* Restore original value.
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*/
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*(int *)CADDR1 = tmp;
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/*
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* Adjust array of valid/good pages.
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*/
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if (page_bad == FALSE) {
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/*
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* If this good page is a continuation of the
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* previous set of good pages, then just increase
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* the end pointer. Otherwise start a new chunk.
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* Note that "end" points one higher than end,
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* making the range >= start and < end.
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* If we're also doing a speculative memory
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* test and we at or past the end, bump up Maxmem
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* so that we keep going. The first bad page
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* will terminate the loop.
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*/
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if (phys_avail[pa_indx] == target_page) {
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phys_avail[pa_indx] += PAGE_SIZE;
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if (speculative_mprobe == TRUE &&
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phys_avail[pa_indx] >= (16*1024*1024))
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Maxmem++;
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} else {
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pa_indx++;
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if (pa_indx == PHYS_AVAIL_ARRAY_END) {
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printf("Too many holes in the physical address space, giving up\n");
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pa_indx--;
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break;
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}
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phys_avail[pa_indx++] = target_page; /* start */
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phys_avail[pa_indx] = target_page + PAGE_SIZE; /* end */
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}
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physmem++;
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}
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}
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*(int *)CMAP1 = 0;
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invltlb();
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/*
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* XXX
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* The last chunk must contain at least one page plus the message
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* buffer to avoid complicating other code (message buffer address
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* calculation, etc.).
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*/
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while (phys_avail[pa_indx - 1] + PAGE_SIZE +
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round_page(MSGBUF_SIZE) >= phys_avail[pa_indx]) {
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physmem -= atop(phys_avail[pa_indx] - phys_avail[pa_indx - 1]);
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phys_avail[pa_indx--] = 0;
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phys_avail[pa_indx--] = 0;
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}
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Maxmem = atop(phys_avail[pa_indx]);
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/* Trim off space for the message buffer. */
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phys_avail[pa_indx] -= round_page(MSGBUF_SIZE);
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avail_end = phys_avail[pa_indx];
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}
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#else
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static void
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getmemsize(int first)
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{
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int i, physmap_idx, pa_indx;
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u_int basemem, extmem;
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struct vm86frame vmf;
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struct vm86context vmc;
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vm_offset_t pa, physmap[PHYSMAP_SIZE];
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pt_entry_t pte;
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const char *cp;
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struct bios_smap *smap;
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bzero(&vmf, sizeof(struct vm86frame));
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#endif
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bzero(physmap, sizeof(physmap));
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/*
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* Perform "base memory" related probes & setup
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*/
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#ifdef PC98
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under16 = pc98_getmemsize(&basemem, &extmem);
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#else
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vm86_intcall(0x12, &vmf);
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basemem = vmf.vmf_ax;
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#endif
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if (basemem > 640) {
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printf("Preposterous BIOS basemem of %uK, truncating to 640K\n",
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basemem);
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@ -1806,6 +1546,7 @@ getmemsize(int first)
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pte = (pt_entry_t)vtopte(KERNBASE + (1 << PAGE_SHIFT));
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*pte = (1 << PAGE_SHIFT) | PG_RW | PG_V;
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#ifndef PC98
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/*
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* get memory map with INT 15:E820
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*/
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@ -1901,6 +1642,7 @@ getmemsize(int first)
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*/
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if ((extmem > 15 * 1024) && (extmem < 16 * 1024))
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extmem = 15 * 1024;
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#endif
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physmap[0] = 0;
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physmap[1] = basemem * 1024;
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@ -1908,7 +1650,17 @@ getmemsize(int first)
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physmap[physmap_idx] = 0x100000;
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physmap[physmap_idx + 1] = physmap[physmap_idx] + extmem * 1024;
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#ifdef PC98
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if ((under16 != 16 * 1024) && (extmem > 15 * 1024)) {
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/* 15M - 16M region is cut off, so need to divide chunk */
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physmap[physmap_idx + 1] = under16 * 1024;
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physmap_idx += 2;
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physmap[physmap_idx] = 0x1000000;
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physmap[physmap_idx + 1] = physmap[2] + extmem * 1024;
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}
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#else
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physmap_done:
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#endif
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/*
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* Now, physmap contains a map of physical memory.
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*/
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@ -1934,7 +1686,7 @@ getmemsize(int first)
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#endif
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/*
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* hw.maxmem is a size in bytes; we also allow k, m, and g suffixes
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* hw.physmem is a size in bytes; we also allow k, m, and g suffixes
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* for the appropriate modifiers. This overrides MAXMEM.
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*/
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if ((cp = getenv("hw.physmem")) != NULL) {
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@ -2022,7 +1774,11 @@ getmemsize(int first)
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/*
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* map page into kernel: valid, read/write,non-cacheable
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*/
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#ifdef PC98
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*pte = pa | PG_V | PG_RW | pg_n;
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#else
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*pte = pa | PG_V | PG_RW | PG_N;
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#endif
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invltlb();
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tmp = *(int *)ptr;
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@ -2114,7 +1870,6 @@ getmemsize(int first)
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avail_end = phys_avail[pa_indx];
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}
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#endif
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void
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init386(first)
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|
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@ -1451,92 +1451,26 @@ sdtossd(sd, ssd)
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* Total memory size may be set by the kernel environment variable
|
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* hw.physmem or the compile-time define MAXMEM.
|
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*/
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#ifdef PC98
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static void
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getmemsize(int first)
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{
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u_int biosbasemem, biosextmem;
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u_int pagesinbase, pagesinext;
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int pa_indx;
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int pg_n;
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int speculative_mprobe;
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#ifdef DEV_NPX
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int msize;
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#endif
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unsigned under16;
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vm_offset_t target_page;
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pc98_getmemsize(&biosbasemem, &biosextmem, &under16);
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#ifdef SMP
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/* make hole for AP bootstrap code */
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pagesinbase = mp_bootaddress(biosbasemem) / PAGE_SIZE;
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int i, physmap_idx, pa_indx;
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u_int basemem, extmem;
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#ifdef PC98
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int pg_n;
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u_int under16;
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#else
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pagesinbase = biosbasemem * 1024 / PAGE_SIZE;
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struct vm86frame vmf;
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struct vm86context vmc;
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#endif
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pagesinext = biosextmem * 1024 / PAGE_SIZE;
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Maxmem_under16M = under16 * 1024 / PAGE_SIZE;
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|
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#ifndef MAXMEM
|
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/*
|
||||
* 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)
|
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speculative_mprobe = TRUE;
|
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else
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speculative_mprobe = FALSE;
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#else
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Maxmem = MAXMEM/4;
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speculative_mprobe = FALSE;
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vm_offset_t pa, physmap[PHYSMAP_SIZE];
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pt_entry_t pte;
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const char *cp;
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#ifndef PC98
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struct bios_smap *smap;
|
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#endif
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#ifdef DEV_NPX
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if (resource_int_value("npx", 0, "msize", &msize) == 0) {
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if (msize != 0) {
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Maxmem = msize / 4;
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speculative_mprobe = FALSE;
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}
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}
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#endif
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|
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#ifdef SMP
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/* look for the MP hardware - needed for apic addresses */
|
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mp_probe();
|
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#endif
|
||||
|
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/* call pmap initialization to make new kernel address space */
|
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pmap_bootstrap (first, 0);
|
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|
||||
/*
|
||||
* Size up each available chunk of physical memory.
|
||||
*/
|
||||
|
||||
/*
|
||||
* We currently don't bother testing base memory.
|
||||
* XXX ...but we probably should.
|
||||
*/
|
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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)
|
||||
|
|
|
|||
|
|
@ -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;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
|
|||
|
|
@ -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 *));
|
||||
|
|
|
|||
Loading…
Reference in a new issue