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author | Ingo Molnar <mingo@elte.hu> | 2009-01-11 02:42:53 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-01-11 02:42:53 +0100 |
commit | 506c10f26c481b7f8ef27c1c79290f68989b2e9e (patch) | |
tree | 03de82e812f00957aa6276dac2fe51c3358e88d7 /arch/sparc/prom/console_32.c | |
parent | e1df957670aef74ffd9a4ad93e6d2c90bf6b4845 (diff) | |
parent | c59765042f53a79a7a65585042ff463b69cb248c (diff) | |
download | talos-obmc-linux-506c10f26c481b7f8ef27c1c79290f68989b2e9e.tar.gz talos-obmc-linux-506c10f26c481b7f8ef27c1c79290f68989b2e9e.zip |
Merge commit 'v2.6.29-rc1' into perfcounters/core
Conflicts:
include/linux/kernel_stat.h
Diffstat (limited to 'arch/sparc/prom/console_32.c')
-rw-r--r-- | arch/sparc/prom/console_32.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/sparc/prom/console_32.c b/arch/sparc/prom/console_32.c new file mode 100644 index 000000000000..b3075d73fc19 --- /dev/null +++ b/arch/sparc/prom/console_32.c @@ -0,0 +1,98 @@ +/* + * 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 <asm/system.h> +#include <linux/string.h> + +extern void restore_current(void); + +/* Non blocking get character from console input device, returns -1 + * if no input was taken. This can be used for polling. + */ +int +prom_nbgetchar(void) +{ + static char inc; + int i = -1; + unsigned long flags; + + spin_lock_irqsave(&prom_lock, flags); + switch(prom_vers) { + case PROM_V0: + i = (*(romvec->pv_nbgetchar))(); + break; + case PROM_V2: + case PROM_V3: + if( (*(romvec->pv_v2devops).v2_dev_read)(*romvec->pv_v2bootargs.fd_stdin , &inc, 0x1) == 1) { + i = inc; + } else { + i = -1; + } + break; + default: + i = -1; + break; + }; + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + return i; /* Ugh, we could spin forever on unsupported proms ;( */ +} + +/* Non blocking put character to console device, returns -1 if + * unsuccessful. + */ +int +prom_nbputchar(char c) +{ + static char outc; + unsigned long flags; + int i = -1; + + spin_lock_irqsave(&prom_lock, flags); + switch(prom_vers) { + case PROM_V0: + i = (*(romvec->pv_nbputchar))(c); + break; + case PROM_V2: + case PROM_V3: + outc = c; + if( (*(romvec->pv_v2devops).v2_dev_write)(*romvec->pv_v2bootargs.fd_stdout, &outc, 0x1) == 1) + i = 0; + else + i = -1; + break; + default: + i = -1; + break; + }; + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + return i; /* Ugh, we could spin forever on unsupported proms ;( */ +} + +/* Blocking version of get character routine above. */ +char +prom_getchar(void) +{ + int character; + while((character = prom_nbgetchar()) == -1) ; + return (char) character; +} + +/* Blocking version of put character routine above. */ +void +prom_putchar(char c) +{ + while(prom_nbputchar(c) == -1) ; + return; +} |