limine/common/lib/term.c

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#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <lib/term.h>
#include <lib/real.h>
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#include <lib/misc.h>
#include <mm/pmm.h>
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#include <drivers/vga_textmode.h>
#include <term/backends/framebuffer.h>
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#if defined (BIOS)
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int current_video_mode = -1;
#endif
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struct term_context **terms = NULL;
size_t terms_i = 0;
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int term_backend = _NOT_READY;
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void term_notready(void) {
for (size_t i = 0; i < terms_i; i++) {
struct term_context *term = terms[i];
term->deinit(term, pmm_free);
}
pmm_free(terms, terms_i * sizeof(void *));
terms_i = 0;
terms = NULL;
term_backend = _NOT_READY;
}
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// --- fallback ---
#if defined (BIOS)
static void fallback_raw_putchar(struct term_context *ctx, uint8_t c) {
(void)ctx;
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struct rm_regs r = {0};
r.eax = 0x0e00 | c;
rm_int(0x10, &r, &r);
}
static void fallback_set_cursor_pos(struct term_context *ctx, size_t x, size_t y);
static void fallback_get_cursor_pos(struct term_context *ctx, size_t *x, size_t *y);
static void fallback_clear(struct term_context *ctx, bool move) {
(void)ctx;
size_t x, y;
fallback_get_cursor_pos(NULL, &x, &y);
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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);
if (move) {
x = y = 0;
}
fallback_set_cursor_pos(NULL, x, y);
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}
static void fallback_set_cursor_pos(struct term_context *ctx, size_t x, size_t y) {
(void)ctx;
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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(struct term_context *ctx, size_t *x, size_t *y) {
(void)ctx;
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struct rm_regs r = {0};
r.eax = 0x0300;
r.ebx = 0;
rm_int(0x10, &r, &r);
*x = r.edx & 0xff;
*y = r.edx >> 8;
}
static void fallback_scroll(struct term_context *ctx) {
(void)ctx;
size_t x, y;
fallback_get_cursor_pos(NULL, &x, &y);
fallback_set_cursor_pos(NULL, ctx->cols - 1, ctx->rows - 1);
fallback_raw_putchar(NULL, ' ');
fallback_set_cursor_pos(NULL, x, y);
}
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#elif defined (UEFI)
static size_t cursor_x = 0, cursor_y = 0;
static void fallback_scroll(struct term_context *ctx) {
(void)ctx;
gST->ConOut->SetCursorPosition(gST->ConOut, ctx->cols - 1, ctx->rows - 1);
CHAR16 string[2];
string[0] = ' ';
string[1] = 0;
gST->ConOut->OutputString(gST->ConOut, string);
gST->ConOut->SetCursorPosition(gST->ConOut, cursor_x, cursor_y);
}
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static void fallback_raw_putchar(struct term_context *ctx, uint8_t c) {
if (!ctx->scroll_enabled && cursor_x == ctx->cols - 1 && cursor_y == ctx->rows - 1) {
return;
}
gST->ConOut->EnableCursor(gST->ConOut, true);
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CHAR16 string[2];
string[0] = c;
string[1] = 0;
gST->ConOut->OutputString(gST->ConOut, string);
if (++cursor_x >= ctx->cols) {
cursor_x = 0;
if (++cursor_y >= ctx->rows) {
cursor_y--;
}
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}
gST->ConOut->SetCursorPosition(gST->ConOut, cursor_x, cursor_y);
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}
static void fallback_clear(struct term_context *ctx, bool move) {
(void)ctx;
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gST->ConOut->ClearScreen(gST->ConOut);
if (move) {
cursor_x = cursor_y = 0;
}
gST->ConOut->SetCursorPosition(gST->ConOut, cursor_x, cursor_y);
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}
static void fallback_set_cursor_pos(struct term_context *ctx, size_t x, size_t y) {
(void)ctx;
if (x >= ctx->cols || y >= ctx->rows) {
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return;
}
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gST->ConOut->SetCursorPosition(gST->ConOut, x, y);
cursor_x = x;
cursor_y = y;
}
static void fallback_get_cursor_pos(struct term_context *ctx, size_t *x, size_t *y) {
(void)ctx;
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*x = cursor_x;
*y = cursor_y;
}
#endif
static bool dummy_handle(void) {
return true;
}
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void term_fallback(void) {
term_notready();
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#if defined (UEFI)
if (!efi_boot_services_exited) {
#endif
terms = ext_mem_alloc(sizeof(void *));
terms_i = 1;
terms[0] = ext_mem_alloc(sizeof(struct term_context));
struct term_context *term = terms[0];
fallback_clear(NULL, true);
term->enable_cursor = (void *)dummy_handle;
term->disable_cursor = (void *)dummy_handle;
term->set_text_fg = (void *)dummy_handle;
term->set_text_bg = (void *)dummy_handle;
term->set_text_fg_bright = (void *)dummy_handle;
term->set_text_bg_bright = (void *)dummy_handle;
term->set_text_fg_rgb = (void *)dummy_handle;
term->set_text_bg_rgb = (void *)dummy_handle;
term->set_text_fg_default = (void *)dummy_handle;
term->set_text_bg_default = (void *)dummy_handle;
term->move_character = (void *)dummy_handle;
term->revscroll = (void *)dummy_handle;
term->swap_palette = (void *)dummy_handle;
term->save_state = (void *)dummy_handle;
term->restore_state = (void *)dummy_handle;
term->double_buffer_flush = (void *)dummy_handle;
term->full_refresh = (void *)dummy_handle;
term->deinit = (void *)dummy_handle;
term->raw_putchar = fallback_raw_putchar;
term->clear = fallback_clear;
term->set_cursor_pos = fallback_set_cursor_pos;
term->get_cursor_pos = fallback_get_cursor_pos;
term->scroll = fallback_scroll;
#if defined (UEFI)
UINTN uefi_term_x_size, uefi_term_y_size;
gST->ConOut->QueryMode(gST->ConOut, gST->ConOut->Mode->Mode, &uefi_term_x_size, &uefi_term_y_size);
term->cols = uefi_term_x_size;
term->rows = uefi_term_y_size;
#elif defined (BIOS)
term->cols = 80;
term->rows = 25;
#endif
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term_backend = FALLBACK;
term_context_reinit(term);
term->in_bootloader = true;
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#if defined (UEFI)
}
#endif
}
extern void reset_term(void);
extern void set_cursor_pos_helper(size_t x, size_t y);
#if defined (__i386__)
#define TERM_XFER_CHUNK 8192
static uint8_t xfer_buf[TERM_XFER_CHUNK];
#endif
static uint64_t context_size(struct term_context *term) {
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switch (term_backend) {
#if defined (BIOS)
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case TEXTMODE:
return sizeof(struct textmode_context) + (VD_ROWS * VD_COLS) * 2;
#endif
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case GTERM: {
struct fbterm_context *ctx = (void *)term;
return sizeof(struct fbterm_context) +
ctx->font_bits_size +
ctx->font_bool_size +
ctx->canvas_size +
ctx->grid_size +
ctx->queue_size +
ctx->map_size;
}
default:
return 0;
}
}
static void context_save(struct term_context *term, uint64_t buf) {
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switch (term_backend) {
#if defined (BIOS)
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case TEXTMODE: {
struct textmode_context *ctx = (void *)term;
memcpy32to64(buf, (uintptr_t)ctx, sizeof(struct textmode_context));
buf += sizeof(struct textmode_context);
memcpy32to64(buf, (uintptr_t)ctx->back_buffer, VD_ROWS * VD_COLS);
buf += VD_ROWS * VD_COLS;
memcpy32to64(buf, (uintptr_t)ctx->front_buffer, VD_ROWS * VD_COLS);
buf += VD_ROWS * VD_COLS;
break;
}
#endif
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case GTERM: {
struct fbterm_context *ctx = (void *)term;
memcpy32to64(buf, (uintptr_t)ctx, sizeof(struct fbterm_context));
buf += sizeof(struct fbterm_context);
memcpy32to64(buf, (uintptr_t)ctx->font_bits, ctx->font_bits_size);
buf += ctx->font_bits_size;
memcpy32to64(buf, (uintptr_t)ctx->font_bool, ctx->font_bool_size);
buf += ctx->font_bool_size;
memcpy32to64(buf, (uintptr_t)ctx->canvas, ctx->canvas_size);
buf += ctx->canvas_size;
memcpy32to64(buf, (uintptr_t)ctx->grid, ctx->grid_size);
buf += ctx->grid_size;
memcpy32to64(buf, (uintptr_t)ctx->queue, ctx->queue_size);
buf += ctx->queue_size;
memcpy32to64(buf, (uintptr_t)ctx->map, ctx->map_size);
buf += ctx->map_size;
break;
}
}
}
static void context_restore(struct term_context *term, uint64_t buf) {
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switch (term_backend) {
#if defined (BIOS)
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case TEXTMODE: {
struct textmode_context *ctx = (void *)term;
memcpy32to64((uintptr_t)ctx, buf, sizeof(struct textmode_context));
buf += sizeof(struct textmode_context);
memcpy32to64((uintptr_t)ctx->back_buffer, buf, VD_ROWS * VD_COLS);
buf += VD_ROWS * VD_COLS;
memcpy32to64((uintptr_t)ctx->front_buffer, buf, VD_ROWS * VD_COLS);
buf += VD_ROWS * VD_COLS;
break;
}
#endif
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case GTERM: {
struct fbterm_context *ctx = (void *)term;
memcpy32to64((uintptr_t)ctx, buf, sizeof(struct fbterm_context));
buf += sizeof(struct fbterm_context);
memcpy32to64((uintptr_t)ctx->font_bits, buf, ctx->font_bits_size);
buf += ctx->font_bits_size;
memcpy32to64((uintptr_t)ctx->font_bool, buf, ctx->font_bool_size);
buf += ctx->font_bool_size;
memcpy32to64((uintptr_t)ctx->canvas, buf, ctx->canvas_size);
buf += ctx->canvas_size;
memcpy32to64((uintptr_t)ctx->grid, buf, ctx->grid_size);
buf += ctx->grid_size;
memcpy32to64((uintptr_t)ctx->queue, buf, ctx->queue_size);
buf += ctx->queue_size;
memcpy32to64((uintptr_t)ctx->map, buf, ctx->map_size);
buf += ctx->map_size;
break;
}
}
}
void _term_write(struct term_context *term, uint64_t buf, uint64_t count) {
switch (count) {
case TERM_CTX_SIZE: {
uint64_t ret = context_size(term);
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memcpy32to64(buf, (uint64_t)(uintptr_t)&ret, sizeof(uint64_t));
return;
}
case TERM_CTX_SAVE: {
context_save(term, buf);
return;
}
case TERM_CTX_RESTORE: {
context_restore(term, buf);
return;
}
case TERM_FULL_REFRESH: {
term->full_refresh(term);
return;
}
}
bool native = false;
#if defined (__x86_64__) || defined (__aarch64__)
native = true;
#elif !defined (__i386__)
#error Unknown architecture
#endif
bool autoflush = term->autoflush;
term->autoflush = false;
if (term->in_bootloader || native) {
const char *s = (const char *)(uintptr_t)buf;
term_write(term, s, count);
} else {
#if defined (__i386__)
while (count != 0) {
uint64_t chunk;
if (count > TERM_XFER_CHUNK) {
chunk = TERM_XFER_CHUNK;
} else {
chunk = count;
}
memcpy32to64((uint64_t)(uintptr_t)xfer_buf, buf, chunk);
term_write(term, (const char *)xfer_buf, chunk);
count -= chunk;
buf += chunk;
}
#endif
}
if (autoflush) {
term->double_buffer_flush(term);
}
term->autoflush = autoflush;
}