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-rw-r--r--Makefile2
-rw-r--r--src/apm.c193
-rw-r--r--src/system.c7
-rw-r--r--src/util.h8
4 files changed, 202 insertions, 8 deletions
diff --git a/Makefile b/Makefile
index 1376a279..bb078f45 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ OUT=out/
# Source files
SRC16=floppy.c disk.c system.c clock.c serial.c kbd.c mouse.c output.c \
- boot.c ata.c cdrom.c
+ boot.c ata.c cdrom.c apm.c
SRC32=post.c output.c
TABLESRC=font.c cbt.c floppy_dbt.c
diff --git a/src/apm.c b/src/apm.c
new file mode 100644
index 00000000..9b6d1e38
--- /dev/null
+++ b/src/apm.c
@@ -0,0 +1,193 @@
+// 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 GPLv3 license.
+
+#include "farptr.h" // GET_VAR
+#include "biosvar.h" // struct bregs
+#include "ioport.h" // outb
+#include "util.h" // irq_enable
+
+static void
+out_str(const char *str_cs)
+{
+ u8 *s = (u8*)str_cs;
+ for (;;) {
+ u8 c = GET_VAR(CS, *s);
+ if (!c)
+ break;
+ outb(c, 0x8900);
+ 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_cf(regs, 0);
+}
+
+// APM real mode interface connect
+static void
+handle_155301(struct bregs *regs)
+{
+ set_cf(regs, 0);
+}
+
+// APM 16 bit protected mode interface connect
+static void
+handle_155302(struct bregs *regs)
+{
+ regs->bx = 0; // XXX - apm16_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_cf(regs, 0);
+}
+
+// APM 32 bit protected mode interface connect
+static void
+handle_155303(struct bregs *regs)
+{
+ regs->ax = 0xf000; // 32 bit code segment base
+ regs->ebx = 0; // XXX - apm32_entry
+ regs->cx = 0xf000; // 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 = 0xf000; // data segment address
+ regs->di = 0xfff0; // data segment length
+ set_cf(regs, 0);
+}
+
+// APM interface disconnect
+static void
+handle_155304(struct bregs *regs)
+{
+ set_cf(regs, 0);
+}
+
+// APM cpu idle
+static void
+handle_155305(struct bregs *regs)
+{
+ irq_enable();
+ hlt();
+ set_cf(regs, 0);
+}
+
+// APM Set Power State
+static void
+handle_155307(struct bregs *regs)
+{
+ if (regs->bx != 1) {
+ set_cf(regs, 0);
+ return;
+ }
+ switch (regs->cx) {
+ case 1:
+ out_str("Standby");
+ break;
+ case 2:
+ out_str("Suspend");
+ break;
+ case 3:
+ irq_disable();
+ out_str("Shutdown");
+ for (;;)
+ hlt();
+ break;
+ }
+ set_cf(regs, 0);
+}
+
+static void
+handle_155308(struct bregs *regs)
+{
+ set_cf(regs, 0);
+}
+
+// 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_cf(regs, 0);
+}
+
+// Get PM Event
+static void
+handle_15530b(struct bregs *regs)
+{
+ regs->ah = 0x80; // no event pending
+ set_cf(regs, 1);
+}
+
+// APM Driver Version
+static void
+handle_15530e(struct bregs *regs)
+{
+ regs->ah = 1;
+ regs->al = 2;
+ set_cf(regs, 0);
+}
+
+// APM Engage / Disengage
+static void
+handle_15530f(struct bregs *regs)
+{
+ set_cf(regs, 0);
+}
+
+// APM Get Capabilities
+static void
+handle_155310(struct bregs *regs)
+{
+ regs->bl = 0;
+ regs->cx = 0;
+ set_cf(regs, 0);
+}
+
+static void
+handle_1553XX(struct bregs *regs)
+{
+ set_cf(regs, 1);
+}
+
+void
+handle_1553(struct bregs *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 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;
+ }
+}
diff --git a/src/system.c b/src/system.c
index e09797b6..29f00527 100644
--- a/src/system.c
+++ b/src/system.c
@@ -78,13 +78,6 @@ handle_1552(struct bregs *regs)
handle_ret(regs, 0);
}
-static void
-handle_1553(struct bregs *regs)
-{
- // XXX - APM call
- handle_ret(regs, RET_EUNSUPPORTED);
-}
-
// Sleep for n microseconds. currently using the
// refresh request port 0x61 bit4, toggling every 15usec
static void
diff --git a/src/util.h b/src/util.h
index 29446b30..e84c7d8e 100644
--- a/src/util.h
+++ b/src/util.h
@@ -37,6 +37,11 @@ static inline void nop(void)
asm volatile("nop");
}
+static inline void hlt(void)
+{
+ asm volatile("hlt");
+}
+
#define BX_PANIC(fmt, args...) bprintf(0, fmt , ##args)
#define BX_INFO(fmt, args...) bprintf(0, fmt , ##args)
@@ -121,6 +126,9 @@ void handle_15c2(struct bregs *regs);
// clock.c
void handle_1583(struct bregs *regs);
+// apm.c
+void handle_1553(struct bregs *regs);
+
// Frequent bios return helper
#define RET_EUNSUPPORTED 0x86
static inline void
generated by cgit (git 2.34.1) at 2025-02-24 05:29:57 +0000