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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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 */
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 28 
 
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#include <arch/ega.h>
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#include <arch/drivers/ega.h>
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#include <putchar.h>
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#include <putchar.h>
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#include <mm/page.h>
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#include <mm/page.h>
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#include <mm/as.h>
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#include <mm/as.h>
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#include <arch/mm/page.h>
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#include <arch/mm/page.h>
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#include <synch/spinlock.h>
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#include <synch/spinlock.h>
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#include <arch/types.h>
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#include <arch/types.h>
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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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 41 
 
41 
/*
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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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 46 
 
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SPINLOCK_INITIALIZE(egalock);
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SPINLOCK_INITIALIZE(egalock);
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static __u32 ega_cursor;
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static __u32 ega_cursor;
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static __u8 *videoram;
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static void ega_putchar(chardev_t *d, const char ch);
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static void ega_putchar(chardev_t *d, const char ch);
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chardev_t ega_console;
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chardev_t ega_console;
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static chardev_operations_t ega_ops = {
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static chardev_operations_t ega_ops = {
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void ega_move_cursor(void);
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void ega_move_cursor(void);
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 59 
 
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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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    __u8 hi, lo;
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    __u8 hi, lo;
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    page_mapping_insert(AS_KERNEL, PA2KA(VIDEORAM), VIDEORAM, PAGE_NOT_CACHEABLE);
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    videoram = (__u8 *) hw_map(VIDEORAM, SCREEN * 2);
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    outb(0x3d4,0xe);
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    outb(0x3d4, 0xe);
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    hi = inb(0x3d5);
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    hi = inb(0x3d5);
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    outb(0x3d4,0xf);
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    outb(0x3d4, 0xf);
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    lo = inb(0x3d5);
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    lo = inb(0x3d5);
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    ega_cursor = (hi<<8)|lo;
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    ega_cursor = (hi << 8) | lo;
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 70 
 
69 
    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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 73 
   
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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.width", NULL, ROW);
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    sysinfo_set_item_val("fb.height", NULL, ROWS);
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    sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);
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#ifndef CONFIG_FB
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#ifndef CONFIG_FB
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    putchar('\n');
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    putchar('\n');
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#endif 
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#endif 
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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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{
 86 
{
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    __u8 *vram = (__u8 *) PA2KA(VIDEORAM);
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80 
   
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    vram[ega_cursor*2] = ch;
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    videoram[ega_cursor * 2] = ch;
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}
 88 
}
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 89 
 
84 
/*
 90 
/*
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 * This function takes care of scrolling.
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 * This function takes care of scrolling.
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 */
 92 
 */
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static void ega_check_cursor(void)
 93 
static void ega_check_cursor(void)
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{
 94 
{
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    if (ega_cursor < SCREEN)
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    if (ega_cursor < SCREEN)
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        return;
 96 
        return;
91 
 
 97 
 
92 
    memcpy((void *)PA2KA(VIDEORAM), (void *)(PA2KA(VIDEORAM) + ROW*2), (SCREEN - ROW)*2);
 98 
    memcpy((void *) videoram, (void *) (videoram + ROW * 2), (SCREEN - ROW) * 2);
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    memsetw(PA2KA(VIDEORAM) + (SCREEN - ROW)*2, ROW, 0x0720);
 99 
    memsetw((__address) (videoram + (SCREEN - ROW) * 2), ROW, 0x0720);
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    ega_cursor = ega_cursor - ROW;
 100 
    ega_cursor = ega_cursor - ROW;
95 
}
 101 
}
96 
 
 102 
 
97 
void ega_putchar(chardev_t *d, const char ch)
 103 
void ega_putchar(chardev_t *d, const char ch)
98 
{
 104 
{
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 106 
 
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    ipl = interrupts_disable();
 107 
    ipl = interrupts_disable();
102 
    spinlock_lock(&egalock);
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    spinlock_lock(&egalock);
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 109 
 
104 
    switch (ch) {
 110 
    switch (ch) {
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    case '\n':
 111 
        case '\n':
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        ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;
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            ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;
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        break;
 113 
            break;
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    case '\t':
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        case '\t':
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        ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
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            ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
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        break;
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            break;
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    case '\b':
 117 
        case '\b':
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        if (ega_cursor % ROW)
 118 
            if (ega_cursor % ROW)
113 
            ega_cursor--;
 119 
                ega_cursor--;
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        break;
 120 
            break;
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    default:
 121 
        default:
116 
        ega_display_char(ch);
 122 
            ega_display_char(ch);
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        ega_cursor++;
 123 
            ega_cursor++;
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        break;
 124 
            break;
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        }
 125 
    }
120 
    ega_check_cursor();
 126 
    ega_check_cursor();
121 
    ega_move_cursor();
 127 
    ega_move_cursor();
122 
 
 128 
 
123 
    spinlock_unlock(&egalock);
 129 
    spinlock_unlock(&egalock);
124 
    interrupts_restore(ipl);
 130 
    interrupts_restore(ipl);
125 
}
 131 
}
126 
 
 132 
 
127 
void ega_move_cursor(void)
 133 
void ega_move_cursor(void)
128 
{
 134 
{
129 
    outb(0x3d4,0xe);
 135 
    outb(0x3d4, 0xe);
130 
    outb(0x3d5,(ega_cursor>>8)&0xff);
 136 
    outb(0x3d5, (ega_cursor >> 8) & 0xff);
131 
    outb(0x3d4,0xf);
 137 
    outb(0x3d4, 0xf);
132 
    outb(0x3d5,ega_cursor&0xff);   
 138 
    outb(0x3d5, ega_cursor & 0xff);
133 
}
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}