// Variable layouts of bios.
//
-// Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
+// Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
#ifndef __BIOSVAR_H
#define SET_IVT(vector, segoff) \
SET_FARVAR(SEG_IVT, ((struct rmode_IVT *)0)->ivec[vector], segoff)
+#define FUNC16(func) ({ \
+ ASSERT32FLAT(); \
+ extern void func (void); \
+ SEGOFF(SEG_BIOS, (u32)func - BUILD_BIOS_ADDR); \
+ })
+
/****************************************************************
* Bios Data Area (BDA)
struct segoff_s video_savetable;
u8 other_ac[4];
// 40:B0
- u8 other_b0[10];
+ u8 other_b0[9];
+ u8 vbe_flag;
u16 vbe_mode;
} PACKED;
// ElTorito Device Emulation data
struct cdemu_s {
- struct drive_s *emulated_drive;
+ struct drive_s *emulated_drive_gf;
u32 ilba;
u16 buffer_segment;
u16 load_segment;
u8 checksum;
} PACKED;
+struct usbkeyinfo {
+ union {
+ struct {
+ u8 modifiers;
+ u8 repeatcount;
+ u8 keys[6];
+ };
+ u64 data;
+ };
+};
+
struct extended_bios_data_area_s {
u8 size;
u8 reserved1[0x21];
// 0x121 - Begin custom storage.
u8 ps2ctr;
+ struct usbkeyinfo usbkey_last;
+
int RTCusers;
// El Torito Emulation data
// Stack space available for code that needs it.
u8 extra_stack[512] __aligned(8);
-
- u8 cdemu_buf[2048 * !!CONFIG_CDROM_EMU];
} PACKED;
// The initial size and location of EBDA
FLATPTR_TO_SEG(BUILD_LOWRAM_END - EBDA_SIZE_START*1024)
// Accessor functions
-static inline u16 get_ebda_seg() {
+static inline u16 get_ebda_seg(void) {
return GET_BDA(ebda_seg);
}
static inline struct extended_bios_data_area_s *
-get_ebda_ptr()
+get_ebda_ptr(void)
{
- ASSERT32();
+ ASSERT32FLAT();
return MAKE_FLATPTR(get_ebda_seg(), 0);
}
#define GET_EBDA2(eseg, var) \
* Global variables
****************************************************************/
+#if MODE16 == 0 && MODESEGMENT == 1
+// In 32bit segmented mode %cs may not be readable and the code may be
+// relocated. The entry code sets up %gs with a readable segment and
+// the code offset can be determined by get_global_offset().
+#define GLOBAL_SEGREG GS
+static inline u32 __attribute_const get_global_offset(void) {
+ u32 ret;
+ asm(" calll 1f\n"
+ "1:popl %0\n"
+ " subl $1b, %0"
+ : "=r"(ret));
+ return ret;
+}
+#else
#define GLOBAL_SEGREG CS
-static inline u16 get_global_seg() {
+static inline u32 __attribute_const get_global_offset(void) {
+ return 0;
+}
+#endif
+static inline u16 get_global_seg(void) {
return GET_SEG(GLOBAL_SEGREG);
}
-#define GET_GLOBAL(var) \
- GET_VAR(GLOBAL_SEGREG, (var))
+#define GET_GLOBAL(var) \
+ GET_VAR(GLOBAL_SEGREG, *(typeof(&(var)))((void*)&(var) \
+ + get_global_offset()))
#define SET_GLOBAL(var, val) do { \
- ASSERT32(); \
+ ASSERT32FLAT(); \
(var) = (val); \
} while (0)
-#if MODE16
-#define ADJUST_GLOBAL_PTR(var) (var)
+#if MODESEGMENT
+#define GLOBALFLAT2GLOBAL(var) ((typeof(var))((void*)(var) - BUILD_BIOS_ADDR))
#else
-#define ADJUST_GLOBAL_PTR(var) ((typeof(var))((void*)var - BUILD_BIOS_ADDR))
+#define GLOBALFLAT2GLOBAL(var) (var)
#endif
+// Access a "flat" pointer known to point to the f-segment.
+#define GET_GLOBALFLAT(var) GET_GLOBAL(*GLOBALFLAT2GLOBAL(&(var)))
/****************************************************************