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Annotation of qemu/roms/SLOF/board-js2x/rtas/rtas_out.c, revision 1.1.1.1

1.1       root        1: /******************************************************************************
                      2:  * Copyright (c) 2004, 2008 IBM Corporation
                      3:  * All rights reserved.
                      4:  * This program and the accompanying materials
                      5:  * are made available under the terms of the BSD License
                      6:  * which accompanies this distribution, and is available at
                      7:  * http://www.opensource.org/licenses/bsd-license.php
                      8:  *
                      9:  * Contributors:
                     10:  *     IBM Corporation - initial implementation
                     11:  *****************************************************************************/
                     12: 
                     13: #include <cpu.h>
                     14: #include <string.h>
                     15: #include <stdio.h>
                     16: #include <stdlib.h>
                     17: #include <stdint.h>
                     18: #include <rtas.h>
                     19: #include <hw.h>
                     20: 
                     21: volatile unsigned char *uart;
                     22: volatile unsigned char u4Flag;
                     23: 
                     24: void
                     25: io_init(void)
                     26: {
                     27:        // read ID register: only if it is a PC87427, enable serial2
                     28:        store8_ci(0xf400002e, 0x20);
                     29:        if (load8_ci(0xf400002f) != 0xf2) {
                     30:                uart = (volatile unsigned char *) 0xf40003f8;
                     31:                u4Flag = 0;
                     32:        } else {
                     33:                uart = (volatile unsigned char *) 0xf40002f8;
                     34:                u4Flag = 1;
                     35:        }
                     36: }
                     37: 
                     38: void
                     39: display_char(char ch)
                     40: {
                     41:        volatile int i = 0;
                     42:        volatile unsigned char *uart = (volatile unsigned char *) 0xf40002f8;
                     43:        int cnt = 2;
                     44:        while (cnt--) {
                     45:                set_ci();
                     46:                while (!(uart[5] & 0x20)) {
                     47:                        i++;
                     48:                }
                     49:                uart[0] = ch;
                     50:                clr_ci();
                     51:                uart += 0x100;
                     52:        }
                     53: }
                     54: 
                     55: size_t
                     56: write(int fd __attribute((unused)), const void *buf, size_t cnt)
                     57: {
                     58:        while (cnt--) {
                     59:                display_char(*(char *) buf);
                     60:                if (*(char *) buf++ == '\n')
                     61:                        display_char('\r');
                     62:        }
                     63:        return 0;
                     64: }
                     65: 
                     66: void *
                     67: sbrk(int incr __attribute((unused)))
                     68: {
                     69:        return (void *) -1;
                     70: }
                     71: 
                     72: 
                     73: 
                     74: int
                     75: rtas_display_character(rtas_args_t * pArgs)
                     76: {
                     77:        int retVal = 0;
                     78:        display_char((char) pArgs->args[0]);
                     79:        return retVal;
                     80: }
                     81: 
                     82: unsigned long
                     83: check_flash_image(unsigned long rombase, unsigned long length,
                     84:                  unsigned long start_crc)
                     85: {
                     86:        const uint32_t CrcTableHigh[16] = {
                     87:                0x00000000, 0x4C11DB70, 0x9823B6E0, 0xD4326D90,
                     88:                0x34867077, 0x7897AB07, 0xACA5C697, 0xE0B41DE7,
                     89:                0x690CE0EE, 0x251D3B9E, 0xF12F560E, 0xBD3E8D7E,
                     90:                0x5D8A9099, 0x119B4BE9, 0xC5A92679, 0x89B8FD09
                     91:        };
                     92:        const uint32_t CrcTableLow[16] = {
                     93:                0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9,
                     94:                0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005,
                     95:                0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61,
                     96:                0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD
                     97:        };
                     98: 
                     99:        char *Buffer = (char *) rombase;
                    100:        uint32_t AccumCRC = start_crc;
                    101:        char val;
                    102:        uint32_t Temp;
                    103:        while (length-- > 0) {
                    104:                set_ci();
                    105:                val = *Buffer;
                    106:                clr_ci();
                    107:                Temp = ((AccumCRC >> 24) ^ val) & 0x000000ff;
                    108:                AccumCRC <<= 8;
                    109:                AccumCRC ^= CrcTableHigh[Temp / 16];
                    110:                AccumCRC ^= CrcTableLow[Temp % 16];
                    111:                ++Buffer;
                    112:        }
                    113:        return AccumCRC;
                    114: }

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