diff options
Diffstat (limited to 'arch/sparc/prom/console_32.c')
| -rw-r--r-- | arch/sparc/prom/console_32.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/sparc/prom/console_32.c b/arch/sparc/prom/console_32.c new file mode 100644 index 000000000..6404e5bbb --- /dev/null +++ b/arch/sparc/prom/console_32.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * console.c: Routines that deal with sending and receiving IO + * to/from the current console device using the PROM. + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1998 Pete Zaitcev <zaitcev@yahoo.com> + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <asm/openprom.h> +#include <asm/oplib.h> +#include <linux/string.h> + +extern void restore_current(void); + +/* Non blocking put character to console device, returns -1 if + * unsuccessful. + */ +static int prom_nbputchar(const char *buf) +{ + unsigned long flags; + int i = -1; + + spin_lock_irqsave(&prom_lock, flags); + switch(prom_vers) { + case PROM_V0: + if ((*(romvec->pv_nbputchar))(*buf)) + i = 1; + break; + case PROM_V2: + case PROM_V3: + if ((*(romvec->pv_v2devops).v2_dev_write)(*romvec->pv_v2bootargs.fd_stdout, + buf, 0x1) == 1) + i = 1; + break; + default: + break; + } + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + return i; /* Ugh, we could spin forever on unsupported proms ;( */ +} + +void prom_console_write_buf(const char *buf, int len) +{ + while (len) { + int n = prom_nbputchar(buf); + if (n < 0) + continue; + len--; + buf++; + } +} + |