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#include <arch/asm.h>
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#include <arch/asm.h>
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#include <memstr.h>
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#include <memstr.h>
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#include <console/chardev.h>
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#include <console/chardev.h>
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#include <console/console.h>
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#include <console/console.h>
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#include <sysinfo/sysinfo.h>
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#include <sysinfo/sysinfo.h>
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#include <arch/simics/ega.h>
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#include <arch/drivers/ega.h>
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/*
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/*
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 * The EGA driver.
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 * The EGA driver.
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 * Simple and short. Function for displaying characters and "scrolling".
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 * Simple and short. Function for displaying characters and "scrolling".
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 */
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 */
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};
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};
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void ega_init(void)
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void ega_init(void)
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{
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{
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    videoram = (uint8_t *) (VIDEORAM);
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    videoram = (uint8_t *) (VIDEORAM);
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- 
 
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    /*
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     * Clear the screen.
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     */
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    _memsetw((uintptr_t) videoram, SCREEN, 0x0720);
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    chardev_initialize("ega_out", &ega_console, &ega_ops);
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    chardev_initialize("ega_out", &ega_console, &ega_ops);
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    stdout = &ega_console;
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    stdout = &ega_console;
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    sysinfo_set_item_val("fb", NULL, true);
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    sysinfo_set_item_val("fb", NULL, true);
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    sysinfo_set_item_val("fb.kind", NULL, 2);
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    sysinfo_set_item_val("fb.kind", NULL, 2);
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}
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}
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static void ega_display_char(char ch)
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static void ega_display_char(char ch)
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{
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{
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    videoram[ega_cursor * 2] = ch;
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    videoram[ega_cursor * 2] = ch;
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    videoram[ega_cursor * 2+1] = 7;
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    videoram[ega_cursor * 2 + 1] = 7;
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}
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}
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/*
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/*
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 * This function takes care of scrolling.
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 * This function takes care of scrolling.
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 */
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 */
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static void ega_check_cursor(void)
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static void ega_check_cursor(void)
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{
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{
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    int i;
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    if (ega_cursor < SCREEN)
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    if (ega_cursor < SCREEN)
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        return;
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        return;
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    memcpy((void *) videoram, (void *) (videoram + ROW * 2), (SCREEN - ROW) * 2);
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    memcpy((void *) videoram, (void *) (videoram + ROW * 2), (SCREEN - ROW) * 2);
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    for(i=0;i<ROW*2;i+=2)
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    {
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        videoram[(SCREEN-ROW)*2+i+0]=0x20;
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        videoram[(SCREEN-ROW)*2+i+1]=0x07;
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    _memsetw((uintptr_t) (videoram + (SCREEN - ROW) * 2), ROW, 0x0720);
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    }
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    ega_cursor = ega_cursor - ROW;
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    ega_cursor = ega_cursor - ROW;
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}
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}
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void ega_putchar(chardev_t *d, const char ch)
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void ega_putchar(chardev_t *d, const char ch)
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{
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{
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    spinlock_unlock(&egalock);
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    spinlock_unlock(&egalock);
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    interrupts_restore(ipl);
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    interrupts_restore(ipl);
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}
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}
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 - 
 
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/** @}
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/** @}
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 */
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 */