--- /dev/null
+/*
+ * Common Option ROM Functions
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright Novell Inc, 2009
+ * Authors: Alexander Graf <agraf@suse.de>
+ */
+
+
+#define NO_QEMU_PROTOS
+#include "../../include/hw/nvram/fw_cfg.h"
+
+#define BIOS_CFG_IOPORT_CFG 0x510
+#define BIOS_CFG_IOPORT_DATA 0x511
+
+/* Break the translation block flow so -d cpu shows us values */
+#define DEBUG_HERE \
+ jmp 1f; \
+ 1:
+
+/*
+ * Read a variable from the fw_cfg device.
+ * Clobbers: %edx
+ * Out: %eax
+ */
+.macro read_fw VAR
+ mov $\VAR, %ax
+ mov $BIOS_CFG_IOPORT_CFG, %dx
+ outw %ax, (%dx)
+ mov $BIOS_CFG_IOPORT_DATA, %dx
+ inb (%dx), %al
+ shl $8, %eax
+ inb (%dx), %al
+ shl $8, %eax
+ inb (%dx), %al
+ shl $8, %eax
+ inb (%dx), %al
+ bswap %eax
+.endm
+
+#define read_fw_blob_pre(var) \
+ read_fw var ## _SIZE; \
+ mov %eax, %ecx; \
+ mov $var ## _DATA, %ax; \
+ mov $BIOS_CFG_IOPORT_CFG, %edx; \
+ outw %ax, (%dx); \
+ mov $BIOS_CFG_IOPORT_DATA, %dx; \
+ cld
+
+/*
+ * Read a blob from the fw_cfg device.
+ * Requires _ADDR, _SIZE and _DATA values for the parameter.
+ *
+ * Clobbers: %eax, %edx, %es, %ecx, %edi
+ */
+#define read_fw_blob(var) \
+ read_fw var ## _ADDR; \
+ mov %eax, %edi; \
+ read_fw_blob_pre(var); \
+ /* old as(1) doesn't like this insn so emit the bytes instead: \
+ rep insb (%dx), %es:(%edi); \
+ */ \
+ .dc.b 0xf3,0x6c
+
+/*
+ * Read a blob from the fw_cfg device in forced addr32 mode.
+ * Requires _ADDR, _SIZE and _DATA values for the parameter.
+ *
+ * Clobbers: %eax, %edx, %es, %ecx, %edi
+ */
+#define read_fw_blob_addr32(var) \
+ read_fw var ## _ADDR; \
+ mov %eax, %edi; \
+ read_fw_blob_pre(var); \
+ /* old as(1) doesn't like this insn so emit the bytes instead: \
+ addr32 rep insb (%dx), %es:(%edi); \
+ */ \
+ .dc.b 0x67,0xf3,0x6c
+
+/*
+ * Read a blob from the fw_cfg device in forced addr32 mode, address is in %edi.
+ * Requires _SIZE and _DATA values for the parameter.
+ *
+ * Clobbers: %eax, %edx, %edi, %es, %ecx
+ */
+#define read_fw_blob_addr32_edi(var) \
+ read_fw_blob_pre(var); \
+ /* old as(1) doesn't like this insn so emit the bytes instead: \
+ addr32 rep insb (%dx), %es:(%edi); \
+ */ \
+ .dc.b 0x67,0xf3,0x6c
+
+#define OPTION_ROM_START \
+ .code16; \
+ .text; \
+ .global _start; \
+ _start:; \
+ .short 0xaa55; \
+ .byte (_end - _start) / 512;
+
+#define BOOT_ROM_START \
+ OPTION_ROM_START \
+ lret; \
+ .org 0x18; \
+ .short 0; \
+ .short _pnph; \
+ _pnph: \
+ .ascii "$PnP"; \
+ .byte 0x01; \
+ .byte ( _pnph_len / 16 ); \
+ .short 0x0000; \
+ .byte 0x00; \
+ .byte 0x00; \
+ .long 0x00000000; \
+ .short _manufacturer; \
+ .short _product; \
+ .long 0x00000000; \
+ .short 0x0000; \
+ .short 0x0000; \
+ .short _bev; \
+ .short 0x0000; \
+ .short 0x0000; \
+ .equ _pnph_len, . - _pnph; \
+ _bev:; \
+ /* DS = CS */ \
+ movw %cs, %ax; \
+ movw %ax, %ds;
+
+#define OPTION_ROM_END \
+ .byte 0; \
+ .align 512, 0; \
+ _end:
+
+#define BOOT_ROM_END \
+ _manufacturer:; \
+ .asciz "QEMU"; \
+ _product:; \
+ .asciz BOOT_ROM_PRODUCT; \
+ OPTION_ROM_END
+
Code Review / kvmfornfv.git / blobdiff