source: mainline/boot/tools/ppc32/debug.c@ 26c67a8

#include "font-8x16.h"

#define FB_REG "r8"
#define SCAN_REG "r9"

#define ADDR_REG "r10"
#define FG_REG "r11"
#define BG_REG "r12"

#define FG_COLOR 0xffffffff
#define BG_COLOR 0x00000000

#define BPP 4

void print_macro_init(void) {
        printf(".macro DEBUG_INIT\n");
        printf("#ifdef CONFIG_DEBUG\n");
        printf("\tlis %s, %d\n", FG_REG, FG_COLOR >> 16);
        printf("\tori %s, %s, %d\n", FG_REG, FG_REG, FG_COLOR & 0xffff);
        printf("\t\n");
        printf("\tlis %s, %d\n", BG_REG, BG_COLOR >> 16);
        printf("\tori %s, %s, %d\n", BG_REG, BG_REG, BG_COLOR & 0xffff);
        printf("\t\n");
        printf("\tmr %s, %s\n", ADDR_REG, FB_REG);
        printf("#endif\n");
        printf(".endm\n");
}

void print_macro(const char *name) {
        printf(".macro DEBUG_%s\n", name);
        printf("#ifdef CONFIG_DEBUG\n");
        
        unsigned int y;
        for (y = 0; y < FONT_SCANLINES; y++) {
                printf("\t\n");
                
                if (y > 0)
                        printf("\tadd %s, %s, %s\n", ADDR_REG, ADDR_REG, SCAN_REG);
                
                unsigned int i;
                for (i = 0; name[i] != 0; i++) {
                        char c = name[i];
                        
                        unsigned int x;
                        for (x = 0; x < FONT_WIDTH; x++) {
                                if (((fb_font[c * FONT_SCANLINES + y] >> (FONT_WIDTH - x)) & 1) == 1)
                                        printf("\tstw %s, %d(%s)\n", FG_REG, (i * FONT_WIDTH + x) * BPP, ADDR_REG);
                                else
                                        printf("\tstw %s, %d(%s)\n", BG_REG, (i * FONT_WIDTH + x) * BPP, ADDR_REG);
                        }
                }
        }
        
        printf("#endif\n");
        printf(".endm\n");
}

int main(int argc, char *argv[]) {
        print_macro_init();
        
        int i;
        for (i = 1; i < argc; i++) {
                printf("\n");
                print_macro(argv[i]);
        }
        
        return 0;
}