btext.c (9b6b563c0d2d25ecc3111916031aa7255543fbfb) btext.c (40ef8cbc6d360e564573eb19582249c35d8ba330)
1/*
2 * Procedures for drawing on the screen early on in the boot process.
3 *
4 * Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 */
6#include <linux/config.h>
7#include <linux/kernel.h>
8#include <linux/string.h>

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45
46#define cmapsz (16*256)
47
48static unsigned char vga_font[cmapsz];
49
50int boot_text_mapped;
51int force_printk_to_btext = 0;
52
1/*
2 * Procedures for drawing on the screen early on in the boot process.
3 *
4 * Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 */
6#include <linux/config.h>
7#include <linux/kernel.h>
8#include <linux/string.h>

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45
46#define cmapsz (16*256)
47
48static unsigned char vga_font[cmapsz];
49
50int boot_text_mapped;
51int force_printk_to_btext = 0;
52
53
53#ifdef CONFIG_PPC32
54/* Calc BAT values for mapping the display and store them
55 * in disp_BAT. Those values are then used from head.S to map
56 * the display during identify_machine() and MMU_Init()
57 *
58 * The display is mapped to virtual address 0xD0000000, rather
59 * than 1:1, because some some CHRP machines put the frame buffer
60 * in the region starting at 0xC0000000 (KERNELBASE).
61 * This mapping is temporary and will disappear as soon as the

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88 /* 601 */
89 lowbits = addr & ~0xFF800000UL;
90 addr &= 0xFF800000UL;
91 disp_BAT[0] = vaddr | (_PAGE_NO_CACHE | PP_RWXX) | 4;
92 disp_BAT[1] = addr | BL_8M | 0x40;
93 }
94 logicalDisplayBase = (void *) (vaddr + lowbits);
95}
54/* Calc BAT values for mapping the display and store them
55 * in disp_BAT. Those values are then used from head.S to map
56 * the display during identify_machine() and MMU_Init()
57 *
58 * The display is mapped to virtual address 0xD0000000, rather
59 * than 1:1, because some some CHRP machines put the frame buffer
60 * in the region starting at 0xC0000000 (KERNELBASE).
61 * This mapping is temporary and will disappear as soon as the

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88 /* 601 */
89 lowbits = addr & ~0xFF800000UL;
90 addr &= 0xFF800000UL;
91 disp_BAT[0] = vaddr | (_PAGE_NO_CACHE | PP_RWXX) | 4;
92 disp_BAT[1] = addr | BL_8M | 0x40;
93 }
94 logicalDisplayBase = (void *) (vaddr + lowbits);
95}
96#endif
96
97/* This function will enable the early boot text when doing OF booting. This
98 * way, xmon output should work too
99 */
100void __init
101btext_setup_display(int width, int height, int depth, int pitch,
102 unsigned long address)
103{

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98/* This function will enable the early boot text when doing OF booting. This
99 * way, xmon output should work too
100 */
101void __init
102btext_setup_display(int width, int height, int depth, int pitch,
103 unsigned long address)
104{

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