diff options
Diffstat (limited to 'contrib/syslinux/syslinux-4.03/memdisk/msetup.c')
| -rw-r--r-- | contrib/syslinux/syslinux-4.03/memdisk/msetup.c | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/contrib/syslinux/syslinux-4.03/memdisk/msetup.c b/contrib/syslinux/syslinux-4.03/memdisk/msetup.c deleted file mode 100644 index f40a2c6..0000000 --- a/contrib/syslinux/syslinux-4.03/memdisk/msetup.c +++ /dev/null @@ -1,178 +0,0 @@ -/* ----------------------------------------------------------------------- * - * - * Copyright 2001-2008 H. Peter Anvin - All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, Inc., 53 Temple Place Ste 330, - * Boston MA 02111-1307, USA; either version 2 of the License, or - * (at your option) any later version; incorporated herein by reference. - * - * ----------------------------------------------------------------------- */ - -/* - * msetup.c - * - * Initialization code for memory-based disk - */ - -#include <stdint.h> -#ifdef TEST -# include <string.h> -# include <stdio.h> -#else -# include "memdisk.h" -# include "conio.h" -#endif -#include "e820.h" - -uint32_t dos_mem = 0; /* 0-1MB */ -uint32_t low_mem = 0; /* 1-16MB */ -uint32_t high_mem = 0; /* 16+ MB */ - -#ifndef TEST - -static inline int get_e820(void) -{ - struct e820_info { - uint64_t base; - uint64_t len; - uint32_t type; - } *buf = sys_bounce; - uint32_t copied; - int range_count = 0; - com32sys_t regs; - - memset(®s, 0, sizeof regs); - memset(buf, 0, sizeof *buf); - - do { - regs.eax.l = 0x0000e820; - regs.ecx.l = sizeof(*buf); - regs.edx.l = 0x534d4150; - regs.edi.w[0] = OFFS(buf); - regs.es = SEG(buf); - - intcall(0x15, ®s, ®s); - copied = (regs.eflags.l & 1) ? 0 : regs.ecx.l; - - if (regs.eax.l != 0x534d4150 || copied < 20) - break; - - printf("e820: %08x%08x %08x%08x %d\n", - (uint32_t) (buf->base >> 32), (uint32_t) buf->base, - (uint32_t) (buf->len >> 32), (uint32_t) buf->len, buf->type); - - insertrange(buf->base, buf->len, buf->type); - range_count++; - - } while (regs.ebx.l); - - return !range_count; -} - -static inline void get_dos_mem(void) -{ - com32sys_t regs; - - memset(®s, 0, sizeof regs); - intcall(0x12, ®s, ®s); - insertrange(0, (uint64_t) ((uint32_t) regs.eax.w[0] << 10), 1); - printf(" DOS: %d K\n", regs.eax.w[0]); -} - -static inline int get_e801(void) -{ - int err; - com32sys_t regs; - - memset(®s, 0, sizeof regs); - - regs.eax.w[0] = 0xe801; - intcall(0x15, ®s, ®s); - - if (!(err = regs.eflags.l & 1)) { - if (regs.eax.w[0]) { - insertrange(0x100000, (uint64_t) ((uint32_t) regs.eax.w[0] << 10), - 1); - } - if (regs.ebx.w[0]) { - insertrange(0x1000000, (uint64_t) ((uint32_t) regs.ebx.w[0] << 16), - 1); - } - - printf("e801: %04x %04x\n", regs.eax.w[0], regs.ebx.w[0]); - } - - return err; -} - -static inline int get_88(void) -{ - com32sys_t regs; - int err; - - memset(®s, 0, sizeof regs); - - regs.eax.b[1] = 0x88; - intcall(0x15, ®s, ®s); - - if (!(err = regs.eflags.l & 1)) { - if (regs.eax.w[0]) { - insertrange(0x100000, (uint64_t) ((uint32_t) regs.eax.w[0] << 10), - 1); - } - - printf(" 88: %04x\n", regs.eax.w[0]); - } - - return err; -} - -void get_mem(void) -{ - if (get_e820()) { - get_dos_mem(); - if (get_e801()) { - if (get_88()) { - die("MEMDISK: Unable to obtain memory map\n"); - } - } - } -} - -#endif /* TEST */ - -#define PW(x) (1ULL << (x)) - -void parse_mem(void) -{ - struct e820range *ep; - - dos_mem = low_mem = high_mem = 0; - - /* Derive "dos mem", "high mem", and "low mem" from the range array */ - for (ep = ranges; ep->type != -1U; ep++) { - if (ep->type == 1) { - /* Only look at memory ranges */ - if (ep->start == 0) { - if (ep[1].start > PW(20)) - dos_mem = PW(20); - else - dos_mem = ep[1].start; - } - if (ep->start <= PW(20) && ep[1].start > PW(20)) { - if (ep[1].start > PW(24)) - low_mem = PW(24) - PW(20); - else - low_mem = ep[1].start - PW(20); - } - if (ep->start <= PW(24) && ep[1].start > PW(24)) { - if (ep[1].start > PW(32)) - high_mem = PW(32) - PW(24); - else - high_mem = ep[1].start - PW(24); - } - } - } -} |