diff options
Diffstat (limited to 'contrib/syslinux/latest/com32/modules/meminfo.c')
-rw-r--r-- | contrib/syslinux/latest/com32/modules/meminfo.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/contrib/syslinux/latest/com32/modules/meminfo.c b/contrib/syslinux/latest/com32/modules/meminfo.c new file mode 100644 index 0000000..6e24f35 --- /dev/null +++ b/contrib/syslinux/latest/com32/modules/meminfo.c @@ -0,0 +1,126 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2008 H. Peter Anvin - All Rights Reserved + * Copyright 2009 Intel Corporation; author: H. Peter Anvin + * + * 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., 51 Franklin St, Fifth Floor, + * Boston MA 02110-1301, USA; either version 2 of the License, or + * (at your option) any later version; incorporated herein by reference. + * + * ----------------------------------------------------------------------- */ + +/* + * meminfo.c + * + * Dump the memory map of the system + */ +#include <inttypes.h> +#include <stdio.h> +#include <string.h> +#include <console.h> +#include <com32.h> + +struct e820_data { + uint64_t base; + uint64_t len; + uint32_t type; + uint32_t extattr; +} __attribute__ ((packed)); + +static const char *const e820_types[] = { + "usable", + "reserved", + "ACPI reclaim", + "ACPI NVS", + "unusable", +}; + +static void dump_e820(void) +{ + com32sys_t ireg, oreg; + struct e820_data ed; + uint32_t type; + + memset(&ireg, 0, sizeof ireg); + + ireg.eax.w[0] = 0xe820; + ireg.edx.l = 0x534d4150; + ireg.ecx.l = sizeof(struct e820_data); + ireg.edi.w[0] = OFFS(__com32.cs_bounce); + ireg.es = SEG(__com32.cs_bounce); + + memset(&ed, 0, sizeof ed); + ed.extattr = 1; + + do { + memcpy(__com32.cs_bounce, &ed, sizeof ed); + + __intcall(0x15, &ireg, &oreg); + if (oreg.eflags.l & EFLAGS_CF || + oreg.eax.l != 0x534d4150 || oreg.ecx.l < 20) + break; + + memcpy(&ed, __com32.cs_bounce, sizeof ed); + + if (oreg.ecx.l >= 24) { + /* ebx base length end type */ + printf("%8x %016llx %016llx %016llx %d [%x]", + ireg.ebx.l, ed.base, ed.len, ed.base + ed.len, ed.type, + ed.extattr); + } else { + /* ebx base length end */ + printf("%8x %016llx %016llx %016llx %d [-]", + ireg.ebx.l, ed.base, ed.len, ed.base + ed.len, ed.type); + ed.extattr = 1; + } + + type = ed.type - 1; + if (type < sizeof(e820_types) / sizeof(e820_types[0])) + printf(" %s", e820_types[type]); + + putchar('\n'); + + ireg.ebx.l = oreg.ebx.l; + } while (ireg.ebx.l); +} + +static void dump_legacy(void) +{ + com32sys_t ireg, oreg; + uint16_t dosram = *(uint16_t *) 0x413; + struct { + uint16_t offs, seg; + } *const ivt = (void *)0; + + memset(&ireg, 0, sizeof ireg); + + __intcall(0x12, &ireg, &oreg); + + printf + ("INT 15h = %04x:%04x DOS RAM: %dK (0x%05x) INT 12h: %dK (0x%05x)\n", + ivt[0x15].seg, ivt[0x15].offs, dosram, dosram << 10, oreg.eax.w[0], + oreg.eax.w[0] << 10); + + ireg.eax.b[1] = 0x88; + __intcall(0x15, &ireg, &oreg); + + printf("INT 15 88: 0x%04x (%uK) ", oreg.eax.w[0], oreg.eax.w[0]); + + ireg.eax.w[0] = 0xe801; + __intcall(0x15, &ireg, &oreg); + + printf("INT 15 E801: 0x%04x (%uK) 0x%04x (%uK)\n", + oreg.ecx.w[0], oreg.ecx.w[0], oreg.edx.w[0], oreg.edx.w[0] << 6); +} + +int main(void) +{ + openconsole(&dev_null_r, &dev_stdcon_w); + + dump_legacy(); + dump_e820(); + + return 0; +} |