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term: Move notready and fallback backends to stage 2

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This commit is contained in:
mintsuki 2022-06-17 20:29:23 +02:00
parent 0503ebad2a
commit 382e8d1711
4 changed files with 192 additions and 179 deletions
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6
common/entry.s2.c
View File

@ -77,8 +77,12 @@ enum {
noreturn void entry(uint8_t boot_drive, int boot_from) {
// XXX DO NOT MOVE A20 ENABLE CALL
if (!a20_enable())
if (!a20_enable()) {
term_fallback();
panic(false, "Could not enable A20 line");
}
term_fallback();
init_e820();
init_memmap();

177
common/lib/term.c
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@ -87,183 +87,6 @@ int term_backend = NOT_READY;
size_t term_rows, term_cols;
bool term_runtime = false;
static void notready_raw_putchar(uint8_t c) {
(void)c;
}
static void notready_clear(bool move) {
(void)move;
}
static void notready_void(void) {}
static void notready_set_cursor_pos(size_t x, size_t y) {
(void)x; (void)y;
}
static void notready_get_cursor_pos(size_t *x, size_t *y) {
*x = 0;
*y = 0;
}
static void notready_size_t(size_t n) {
(void)n;
}
static bool notready_disable(void) {
return false;
}
static void notready_move_character(size_t a, size_t b, size_t c, size_t d) {
(void)a; (void)b; (void)c; (void)d;
}
static uint64_t notready_context_size(void) {
return 0;
}
static void notready_uint64_t(uint64_t n) {
(void)n;
}
void term_notready(void) {
term_backend = NOT_READY;
raw_putchar = notready_raw_putchar;
clear = notready_clear;
enable_cursor = notready_void;
disable_cursor = notready_disable;
set_cursor_pos = notready_set_cursor_pos;
get_cursor_pos = notready_get_cursor_pos;
set_text_fg = notready_size_t;
set_text_bg = notready_size_t;
set_text_fg_bright = notready_size_t;
set_text_bg_bright = notready_size_t;
set_text_fg_default = notready_void;
set_text_bg_default = notready_void;
scroll_disable = notready_disable;
scroll_enable = notready_void;
term_move_character = notready_move_character;
term_scroll = notready_void;
term_revscroll = notready_void;
term_swap_palette = notready_void;
term_save_state = notready_void;
term_restore_state = notready_void;
term_double_buffer_flush = notready_void;
term_context_size = notready_context_size;
term_context_save = notready_uint64_t;
term_context_restore = notready_uint64_t;
term_full_refresh = notready_void;
term_cols = 80;
term_rows = 24;
}
#if bios == 1
void fallback_raw_putchar(uint8_t c) {
struct rm_regs r = {0};
r.eax = 0x0e00 | c;
rm_int(0x10, &r, &r);
}
void fallback_clear(bool move) {
(void)move;
struct rm_regs r = {0};
rm_int(0x11, &r, &r);
switch ((r.eax >> 4) & 3) {
case 0:
r.eax = 3;
break;
case 1:
r.eax = 1;
break;
case 2:
r.eax = 3;
break;
case 3:
r.eax = 7;
break;
}
rm_int(0x10, &r, &r);
}
void fallback_set_cursor_pos(size_t x, size_t y) {
struct rm_regs r = {0};
r.eax = 0x0200;
r.ebx = 0;
r.edx = (y << 8) + x;
rm_int(0x10, &r, &r);
}
void fallback_get_cursor_pos(size_t *x, size_t *y) {
struct rm_regs r = {0};
r.eax = 0x0300;
r.ebx = 0;
rm_int(0x10, &r, &r);
*x = r.edx & 0xff;
*y = r.edx >> 8;
}
#elif uefi == 1
static int cursor_x = 0, cursor_y = 0;
void fallback_raw_putchar(uint8_t c) {
CHAR16 string[2];
string[0] = c;
string[1] = 0;
gST->ConOut->OutputString(gST->ConOut, string);
switch (c) {
case 0x08:
if (cursor_x > 0)
cursor_x--;
break;
case 0x0A:
cursor_x = 0;
break;
case 0x0D:
if (cursor_y < 24)
cursor_y++;
break;
default:
if (++cursor_x > 80) {
cursor_x = 0;
if (cursor_y < 24)
cursor_y++;
}
}
}
void fallback_clear(bool move) {
(void)move;
gST->ConOut->ClearScreen(gST->ConOut);
cursor_x = cursor_y = 0;
}
void fallback_set_cursor_pos(size_t x, size_t y) {
if (x >= 80 || y >= 25)
return;
gST->ConOut->SetCursorPosition(gST->ConOut, x, y);
cursor_x = x;
cursor_y = y;
}
void fallback_get_cursor_pos(size_t *x, size_t *y) {
*x = cursor_x;
*y = cursor_y;
}
#endif
void term_fallback(void) {
#if uefi == 1
if (!efi_boot_services_exited) {
gST->ConOut->Reset(gST->ConOut, false);
gST->ConOut->SetMode(gST->ConOut, 0);
cursor_x = cursor_y = 0;
#elif bios == 1
fallback_clear(true);
#endif
term_notready();
raw_putchar = fallback_raw_putchar;
clear = fallback_clear;
set_cursor_pos = fallback_set_cursor_pos;
get_cursor_pos = fallback_get_cursor_pos;
term_backend = FALLBACK;
#if uefi == 1
}
#endif
}
void (*raw_putchar)(uint8_t c);
void (*clear)(bool move);
void (*enable_cursor)(void);

187
common/lib/term.s2.c Normal file
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@ -0,0 +1,187 @@
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <lib/term.h>
#include <lib/blib.h>
#include <lib/real.h>
// --- fallback ---
#if bios == 1
static void fallback_raw_putchar(uint8_t c) {
struct rm_regs r = {0};
r.eax = 0x0e00 | c;
rm_int(0x10, &r, &r);
}
static void fallback_clear(bool move) {
(void)move;
struct rm_regs r = {0};
rm_int(0x11, &r, &r);
switch ((r.eax >> 4) & 3) {
case 0:
r.eax = 3;
break;
case 1:
r.eax = 1;
break;
case 2:
r.eax = 3;
break;
case 3:
r.eax = 7;
break;
}
rm_int(0x10, &r, &r);
}
static void fallback_set_cursor_pos(size_t x, size_t y) {
struct rm_regs r = {0};
r.eax = 0x0200;
r.ebx = 0;
r.edx = (y << 8) + x;
rm_int(0x10, &r, &r);
}
static void fallback_get_cursor_pos(size_t *x, size_t *y) {
struct rm_regs r = {0};
r.eax = 0x0300;
r.ebx = 0;
rm_int(0x10, &r, &r);
*x = r.edx & 0xff;
*y = r.edx >> 8;
}
#elif uefi == 1
static int cursor_x = 0, cursor_y = 0;
static void fallback_raw_putchar(uint8_t c) {
CHAR16 string[2];
string[0] = c;
string[1] = 0;
gST->ConOut->OutputString(gST->ConOut, string);
switch (c) {
case 0x08:
if (cursor_x > 0)
cursor_x--;
break;
case 0x0A:
cursor_x = 0;
break;
case 0x0D:
if (cursor_y < 24)
cursor_y++;
break;
default:
if (++cursor_x > 80) {
cursor_x = 0;
if (cursor_y < 24)
cursor_y++;
}
}
}
static void fallback_clear(bool move) {
(void)move;
gST->ConOut->ClearScreen(gST->ConOut);
cursor_x = cursor_y = 0;
}
static void fallback_set_cursor_pos(size_t x, size_t y) {
if (x >= 80 || y >= 25)
return;
gST->ConOut->SetCursorPosition(gST->ConOut, x, y);
cursor_x = x;
cursor_y = y;
}
static void fallback_get_cursor_pos(size_t *x, size_t *y) {
*x = cursor_x;
*y = cursor_y;
}
#endif
void term_fallback(void) {
#if uefi == 1
if (!efi_boot_services_exited) {
gST->ConOut->Reset(gST->ConOut, false);
gST->ConOut->SetMode(gST->ConOut, 0);
cursor_x = cursor_y = 0;
#elif bios == 1
fallback_clear(true);
#endif
term_notready();
raw_putchar = fallback_raw_putchar;
clear = fallback_clear;
set_cursor_pos = fallback_set_cursor_pos;
get_cursor_pos = fallback_get_cursor_pos;
term_backend = FALLBACK;
#if uefi == 1
}
#endif
}
// --- notready ---
static void notready_raw_putchar(uint8_t c) {
(void)c;
}
static void notready_clear(bool move) {
(void)move;
}
static void notready_void(void) {}
static void notready_set_cursor_pos(size_t x, size_t y) {
(void)x; (void)y;
}
static void notready_get_cursor_pos(size_t *x, size_t *y) {
*x = 0;
*y = 0;
}
static void notready_size_t(size_t n) {
(void)n;
}
static bool notready_disable(void) {
return false;
}
static void notready_move_character(size_t a, size_t b, size_t c, size_t d) {
(void)a; (void)b; (void)c; (void)d;
}
static uint64_t notready_context_size(void) {
return 0;
}
static void notready_uint64_t(uint64_t n) {
(void)n;
}
void term_notready(void) {
term_backend = NOT_READY;
raw_putchar = notready_raw_putchar;
clear = notready_clear;
enable_cursor = notready_void;
disable_cursor = notready_disable;
set_cursor_pos = notready_set_cursor_pos;
get_cursor_pos = notready_get_cursor_pos;
set_text_fg = notready_size_t;
set_text_bg = notready_size_t;
set_text_fg_bright = notready_size_t;
set_text_bg_bright = notready_size_t;
set_text_fg_default = notready_void;
set_text_bg_default = notready_void;
scroll_disable = notready_disable;
scroll_enable = notready_void;
term_move_character = notready_move_character;
term_scroll = notready_void;
term_revscroll = notready_void;
term_swap_palette = notready_void;
term_save_state = notready_void;
term_restore_state = notready_void;
term_double_buffer_flush = notready_void;
term_context_size = notready_context_size;
term_context_save = notready_uint64_t;
term_context_restore = notready_uint64_t;
term_full_refresh = notready_void;
term_cols = 80;
term_rows = 24;
}

1
common/linker_bios.ld.in
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@ -41,7 +41,6 @@ SECTIONS
term_write = .;
term_textmode = .;
term_vbe = .;
term_fallback = .;
stage3_addr = .;
data_begin = .;
#else