diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-30 17:23:31 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-30 17:23:31 -0800 |
commit | 6de71484cf9561edb45224f659a9db38b6056d5e (patch) | |
tree | 588fe6f7c98147b805085503c863d371e2fa497e /arch/sparc/prom/console_32.c | |
parent | 1dff81f20cd55ffa5a8ee984da70ce0b99d29606 (diff) | |
parent | e3c6d4ee545e427b55882d97d3b663c6411645fe (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (98 commits)
sparc: move select of ARCH_SUPPORTS_MSI
sparc: drop SUN_IO
sparc: unify sections.h
sparc: use .data.init_task section for init_thread_union
sparc: fix array overrun check in of_device_64.c
sparc: unify module.c
sparc64: prepare module_64.c for unification
sparc64: use bit neutral Elf symbols
sparc: unify module.h
sparc: introduce CONFIG_BITS
sparc: fix hardirq.h removal fallout
sparc64: do not export pus_fs_struct
sparc: use sparc64 version of scatterlist.h
sparc: Commonize memcmp assembler.
sparc: Unify strlen assembler.
sparc: Add asm/asm.h
sparc: Kill memcmp_32.S code which has been ifdef'd out for centuries.
sparc: replace for_each_cpu_mask_nr with for_each_cpu
sparc: fix sparse warnings in irq_32.c
sparc: add include guards to kernel.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 00000000000..b3075d73fc1 --- /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; +} |