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Diffstat (limited to 'arch/powerpc/kernel/btext.c')
-rw-r--r--arch/powerpc/kernel/btext.c136
1 files changed, 95 insertions, 41 deletions
diff --git a/arch/powerpc/kernel/btext.c b/arch/powerpc/kernel/btext.c
index bdfba92b2b3..6223d39177c 100644
--- a/arch/powerpc/kernel/btext.c
+++ b/arch/powerpc/kernel/btext.c
@@ -31,15 +31,18 @@ static void draw_byte_32(unsigned char *bits, unsigned int *base, int rb);
static void draw_byte_16(unsigned char *bits, unsigned int *base, int rb);
static void draw_byte_8(unsigned char *bits, unsigned int *base, int rb);
-static int g_loc_X;
-static int g_loc_Y;
-static int g_max_loc_X;
-static int g_max_loc_Y;
+#define __force_data __attribute__((__section__(".data")))
-static int dispDeviceRowBytes;
-static int dispDeviceDepth;
-static int dispDeviceRect[4];
-static unsigned char *dispDeviceBase, *logicalDisplayBase;
+static int g_loc_X __force_data;
+static int g_loc_Y __force_data;
+static int g_max_loc_X __force_data;
+static int g_max_loc_Y __force_data;
+
+static int dispDeviceRowBytes __force_data;
+static int dispDeviceDepth __force_data;
+static int dispDeviceRect[4] __force_data;
+static unsigned char *dispDeviceBase __force_data;
+static unsigned char *logicalDisplayBase __force_data;
unsigned long disp_BAT[2] __initdata = {0, 0};
@@ -47,7 +50,7 @@ unsigned long disp_BAT[2] __initdata = {0, 0};
static unsigned char vga_font[cmapsz];
-int boot_text_mapped;
+int boot_text_mapped __force_data = 0;
int force_printk_to_btext = 0;
#ifdef CONFIG_PPC32
@@ -57,7 +60,7 @@ int force_printk_to_btext = 0;
*
* The display is mapped to virtual address 0xD0000000, rather
* than 1:1, because some some CHRP machines put the frame buffer
- * in the region starting at 0xC0000000 (KERNELBASE).
+ * in the region starting at 0xC0000000 (PAGE_OFFSET).
* This mapping is temporary and will disappear as soon as the
* setup done by MMU_Init() is applied.
*
@@ -66,10 +69,9 @@ int force_printk_to_btext = 0;
* is really badly aligned, but I didn't encounter this case
* yet.
*/
-void __init
-btext_prepare_BAT(void)
+void __init btext_prepare_BAT(void)
{
- unsigned long vaddr = KERNELBASE + 0x10000000;
+ unsigned long vaddr = PAGE_OFFSET + 0x10000000;
unsigned long addr;
unsigned long lowbits;
@@ -95,12 +97,13 @@ btext_prepare_BAT(void)
}
#endif
-/* This function will enable the early boot text when doing OF booting. This
- * way, xmon output should work too
+
+/* This function can be used to enable the early boot text when doing
+ * OF booting or within bootx init. It must be followed by a btext_unmap()
+ * call before the logical address becomes unuseable
*/
-void __init
-btext_setup_display(int width, int height, int depth, int pitch,
- unsigned long address)
+void __init btext_setup_display(int width, int height, int depth, int pitch,
+ unsigned long address)
{
g_loc_X = 0;
g_loc_Y = 0;
@@ -116,6 +119,11 @@ btext_setup_display(int width, int height, int depth, int pitch,
boot_text_mapped = 1;
}
+void __init btext_unmap(void)
+{
+ boot_text_mapped = 0;
+}
+
/* Here's a small text engine to use during early boot
* or for debugging purposes
*
@@ -127,7 +135,7 @@ btext_setup_display(int width, int height, int depth, int pitch,
* changes.
*/
-void map_boot_text(void)
+static void map_boot_text(void)
{
unsigned long base, offset, size;
unsigned char *vbase;
@@ -175,8 +183,9 @@ int btext_initialize(struct device_node *np)
if (prop)
address = *prop;
- /* FIXME: Add support for PCI reg properties */
-
+ /* FIXME: Add support for PCI reg properties. Right now, only
+ * reliable on macs
+ */
if (address == 0)
return -EINVAL;
@@ -184,7 +193,6 @@ int btext_initialize(struct device_node *np)
g_loc_Y = 0;
g_max_loc_X = width / 8;
g_max_loc_Y = height / 16;
- logicalDisplayBase = (unsigned char *)address;
dispDeviceBase = (unsigned char *)address;
dispDeviceRowBytes = pitch;
dispDeviceDepth = depth;
@@ -197,14 +205,12 @@ int btext_initialize(struct device_node *np)
return 0;
}
-void __init init_boot_display(void)
+int __init btext_find_display(int allow_nonstdout)
{
char *name;
struct device_node *np = NULL;
int rc = -ENODEV;
- printk("trying to initialize btext ...\n");
-
name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
if (name != NULL) {
np = of_find_node_by_path(name);
@@ -218,8 +224,8 @@ void __init init_boot_display(void)
}
if (np)
rc = btext_initialize(np);
- if (rc == 0)
- return;
+ if (rc == 0 || !allow_nonstdout)
+ return rc;
for (np = NULL; (np = of_find_node_by_type(np, "display"));) {
if (get_property(np, "linux,opened", NULL)) {
@@ -228,8 +234,9 @@ void __init init_boot_display(void)
printk("result: %d\n", rc);
}
if (rc == 0)
- return;
+ break;
}
+ return rc;
}
/* Calc the base address of a given point (x,y) */
@@ -277,44 +284,83 @@ EXPORT_SYMBOL(btext_update_display);
void btext_clearscreen(void)
{
- unsigned long *base = (unsigned long *)calc_base(0, 0);
+ unsigned int *base = (unsigned int *)calc_base(0, 0);
unsigned long width = ((dispDeviceRect[2] - dispDeviceRect[0]) *
- (dispDeviceDepth >> 3)) >> 3;
+ (dispDeviceDepth >> 3)) >> 2;
int i,j;
for (i=0; i<(dispDeviceRect[3] - dispDeviceRect[1]); i++)
{
- unsigned long *ptr = base;
+ unsigned int *ptr = base;
for(j=width; j; --j)
*(ptr++) = 0;
- base += (dispDeviceRowBytes >> 3);
+ base += (dispDeviceRowBytes >> 2);
}
}
+void btext_flushscreen(void)
+{
+ unsigned int *base = (unsigned int *)calc_base(0, 0);
+ unsigned long width = ((dispDeviceRect[2] - dispDeviceRect[0]) *
+ (dispDeviceDepth >> 3)) >> 2;
+ int i,j;
+
+ for (i=0; i < (dispDeviceRect[3] - dispDeviceRect[1]); i++)
+ {
+ unsigned int *ptr = base;
+ for(j = width; j > 0; j -= 8) {
+ __asm__ __volatile__ ("dcbst 0,%0" :: "r" (ptr));
+ ptr += 8;
+ }
+ base += (dispDeviceRowBytes >> 2);
+ }
+ __asm__ __volatile__ ("sync" ::: "memory");
+}
+
+void btext_flushline(void)
+{
+ unsigned int *base = (unsigned int *)calc_base(0, g_loc_Y << 4);
+ unsigned long width = ((dispDeviceRect[2] - dispDeviceRect[0]) *
+ (dispDeviceDepth >> 3)) >> 2;
+ int i,j;
+
+ for (i=0; i < 16; i++)
+ {
+ unsigned int *ptr = base;
+ for(j = width; j > 0; j -= 8) {
+ __asm__ __volatile__ ("dcbst 0,%0" :: "r" (ptr));
+ ptr += 8;
+ }
+ base += (dispDeviceRowBytes >> 2);
+ }
+ __asm__ __volatile__ ("sync" ::: "memory");
+}
+
+
#ifndef NO_SCROLL
static void scrollscreen(void)
{
- unsigned long *src = (unsigned long *)calc_base(0,16);
- unsigned long *dst = (unsigned long *)calc_base(0,0);
+ unsigned int *src = (unsigned int *)calc_base(0,16);
+ unsigned int *dst = (unsigned int *)calc_base(0,0);
unsigned long width = ((dispDeviceRect[2] - dispDeviceRect[0]) *
- (dispDeviceDepth >> 3)) >> 3;
+ (dispDeviceDepth >> 3)) >> 2;
int i,j;
for (i=0; i<(dispDeviceRect[3] - dispDeviceRect[1] - 16); i++)
{
- unsigned long *src_ptr = src;
- unsigned long *dst_ptr = dst;
+ unsigned int *src_ptr = src;
+ unsigned int *dst_ptr = dst;
for(j=width; j; --j)
*(dst_ptr++) = *(src_ptr++);
- src += (dispDeviceRowBytes >> 3);
- dst += (dispDeviceRowBytes >> 3);
+ src += (dispDeviceRowBytes >> 2);
+ dst += (dispDeviceRowBytes >> 2);
}
for (i=0; i<16; i++)
{
- unsigned long *dst_ptr = dst;
+ unsigned int *dst_ptr = dst;
for(j=width; j; --j)
*(dst_ptr++) = 0;
- dst += (dispDeviceRowBytes >> 3);
+ dst += (dispDeviceRowBytes >> 2);
}
}
#endif /* ndef NO_SCROLL */
@@ -377,6 +423,14 @@ void btext_drawstring(const char *c)
btext_drawchar(*c++);
}
+void btext_drawtext(const char *c, unsigned int len)
+{
+ if (!boot_text_mapped)
+ return;
+ while (len--)
+ btext_drawchar(*c++);
+}
+
void btext_drawhex(unsigned long v)
{
char *hex_table = "0123456789abcdef";
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-26 00:02:34 +0000