47 lines
1000 B
C
47 lines
1000 B
C
/* console.c: Routines that deal with sending and receiving IO
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* to/from the current console device using the PROM.
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*
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* Copyright (C) 1995 David S. Miller (davem@davemloft.net)
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* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <asm/openprom.h>
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#include <asm/oplib.h>
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#include <asm/system.h>
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#include <linux/string.h>
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static int __prom_console_write_buf(const char *buf, int len)
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{
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unsigned long args[7];
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int ret;
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args[0] = (unsigned long) "write";
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args[1] = 3;
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args[2] = 1;
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args[3] = (unsigned int) prom_stdout;
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args[4] = (unsigned long) buf;
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args[5] = (unsigned int) len;
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args[6] = (unsigned long) -1;
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p1275_cmd_direct(args);
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ret = (int) args[6];
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if (ret < 0)
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return -1;
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return ret;
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}
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void prom_console_write_buf(const char *buf, int len)
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{
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while (len) {
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int n = __prom_console_write_buf(buf, len);
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if (n < 0)
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continue;
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len -= n;
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buf += len;
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}
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}
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