| // Basic support for apmbios callbacks. |
| // |
| // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> |
| // Copyright (C) 2005 Struan Bartlett |
| // Copyright (C) 2004 Fabrice Bellard |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "farptr.h" // GET_VAR |
| #include "bregs.h" // struct bregs |
| #include "ioport.h" // outb |
| #include "util.h" // wait_irq |
| #include "config.h" // CONFIG_* |
| #include "biosvar.h" // GET_GLOBAL |
| |
| static void |
| out_str(const char *str_cs) |
| { |
| if (CONFIG_COREBOOT) { |
| dprintf(1, "APM request '%s'\n", str_cs); |
| return; |
| } |
| |
| u8 *s = (u8*)str_cs; |
| for (;;) { |
| u8 c = GET_GLOBAL(*s); |
| if (!c) |
| break; |
| outb(c, PORT_BIOS_APM); |
| s++; |
| } |
| } |
| |
| // APM installation check |
| static void |
| handle_155300(struct bregs *regs) |
| { |
| regs->ah = 1; // APM major version |
| regs->al = 2; // APM minor version |
| regs->bh = 'P'; |
| regs->bl = 'M'; |
| // bit 0 : 16 bit interface supported |
| // bit 1 : 32 bit interface supported |
| regs->cx = 0x03; |
| set_success(regs); |
| } |
| |
| // APM real mode interface connect |
| static void |
| handle_155301(struct bregs *regs) |
| { |
| set_success(regs); |
| } |
| |
| // Assembler entry points defined in romlayout.S |
| extern void apm16protected_entry(void); |
| extern void apm32protected_entry(void); |
| |
| // APM 16 bit protected mode interface connect |
| static void |
| handle_155302(struct bregs *regs) |
| { |
| regs->bx = (u32)apm16protected_entry; |
| regs->ax = SEG_BIOS; // 16 bit code segment base |
| regs->si = 0xfff0; // 16 bit code segment size |
| regs->cx = SEG_BIOS; // data segment address |
| regs->di = 0xfff0; // data segment length |
| set_success(regs); |
| } |
| |
| // APM 32 bit protected mode interface connect |
| static void |
| handle_155303(struct bregs *regs) |
| { |
| regs->ax = SEG_BIOS; // 32 bit code segment base |
| regs->ebx = (u32)apm32protected_entry; |
| regs->cx = SEG_BIOS; // 16 bit code segment base |
| // 32 bit code segment size (low 16 bits) |
| // 16 bit code segment size (high 16 bits) |
| regs->esi = 0xfff0fff0; |
| regs->dx = SEG_BIOS; // data segment address |
| regs->di = 0xfff0; // data segment length |
| set_success(regs); |
| } |
| |
| // APM interface disconnect |
| static void |
| handle_155304(struct bregs *regs) |
| { |
| set_success(regs); |
| } |
| |
| // APM cpu idle |
| static void |
| handle_155305(struct bregs *regs) |
| { |
| wait_irq(); |
| set_success(regs); |
| } |
| |
| // APM cpu busy |
| static void |
| handle_155306(struct bregs *regs) |
| { |
| set_success(regs); |
| } |
| |
| void |
| apm_shutdown(void) |
| { |
| irq_disable(); |
| out_str("Shutdown"); |
| for (;;) |
| hlt(); |
| } |
| |
| // APM Set Power State |
| static void |
| handle_155307(struct bregs *regs) |
| { |
| if (regs->bx != 1) { |
| set_success(regs); |
| return; |
| } |
| switch (regs->cx) { |
| case 1: |
| out_str("Standby"); |
| break; |
| case 2: |
| out_str("Suspend"); |
| break; |
| case 3: |
| apm_shutdown(); |
| break; |
| } |
| set_success(regs); |
| } |
| |
| static void |
| handle_155308(struct bregs *regs) |
| { |
| set_success(regs); |
| } |
| |
| // Get Power Status |
| static void |
| handle_15530a(struct bregs *regs) |
| { |
| regs->bh = 0x01; // on line |
| regs->bl = 0xff; // unknown battery status |
| regs->ch = 0x80; // no system battery |
| regs->cl = 0xff; // unknown remaining time |
| regs->dx = 0xffff; // unknown remaining time |
| regs->si = 0x00; // zero battery |
| set_success(regs); |
| } |
| |
| #define RET_ENOEVENT 0x80 |
| |
| // Get PM Event |
| static void |
| handle_15530b(struct bregs *regs) |
| { |
| set_code_invalid_silent(regs, RET_ENOEVENT); |
| } |
| |
| // APM Driver Version |
| static void |
| handle_15530e(struct bregs *regs) |
| { |
| regs->ah = 1; |
| regs->al = 2; |
| set_success(regs); |
| } |
| |
| // APM Engage / Disengage |
| static void |
| handle_15530f(struct bregs *regs) |
| { |
| set_success(regs); |
| } |
| |
| // APM Get Capabilities |
| static void |
| handle_155310(struct bregs *regs) |
| { |
| regs->bl = 0; |
| regs->cx = 0; |
| set_success(regs); |
| } |
| |
| static void |
| handle_1553XX(struct bregs *regs) |
| { |
| set_unimplemented(regs); |
| } |
| |
| void |
| handle_1553(struct bregs *regs) |
| { |
| if (! CONFIG_APMBIOS) { |
| set_code_invalid(regs, RET_EUNSUPPORTED); |
| return; |
| } |
| |
| //debug_stub(regs); |
| switch (regs->al) { |
| case 0x00: handle_155300(regs); break; |
| case 0x01: handle_155301(regs); break; |
| case 0x02: handle_155302(regs); break; |
| case 0x03: handle_155303(regs); break; |
| case 0x04: handle_155304(regs); break; |
| case 0x05: handle_155305(regs); break; |
| case 0x06: handle_155306(regs); break; |
| case 0x07: handle_155307(regs); break; |
| case 0x08: handle_155308(regs); break; |
| case 0x0a: handle_15530a(regs); break; |
| case 0x0b: handle_15530b(regs); break; |
| case 0x0e: handle_15530e(regs); break; |
| case 0x0f: handle_15530f(regs); break; |
| case 0x10: handle_155310(regs); break; |
| default: handle_1553XX(regs); break; |
| } |
| } |
| |
| void VISIBLE16 |
| handle_apm16(struct bregs *regs) |
| { |
| debug_enter(regs, DEBUG_HDL_apm); |
| handle_1553(regs); |
| } |
| |
| void VISIBLE32SEG |
| handle_apm32(struct bregs *regs) |
| { |
| debug_enter(regs, DEBUG_HDL_apm); |
| handle_1553(regs); |
| } |