git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 88278ca2 | 1 | /* |
| 1da177e4 LT |
2 | * mpmbox.h: Interface and defines for the OpenProm mailbox |
| 3 | * facilities for MP machines under Linux. | |
| 4 | * | |
| 5 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef _SPARC_MPMBOX_H | |
| 9 | #define _SPARC_MPMBOX_H | |
| 10 | ||
| 11 | /* The prom allocates, for each CPU on the machine an unsigned | |
| 12 | * byte in physical ram. You probe the device tree prom nodes | |
| 13 | * for these values. The purpose of this byte is to be able to | |
| 14 | * pass messages from one cpu to another. | |
| 15 | */ | |
| 16 | ||
| 17 | /* These are the main message types we have to look for in our | |
| 18 | * Cpu mailboxes, based upon these values we decide what course | |
| 19 | * of action to take. | |
| 20 | */ | |
| 21 | ||
| 22 | /* The CPU is executing code in the kernel. */ | |
| 23 | #define MAILBOX_ISRUNNING 0xf0 | |
| 24 | ||
| 25 | /* Another CPU called romvec->pv_exit(), you should call | |
| 26 | * prom_stopcpu() when you see this in your mailbox. | |
| 27 | */ | |
| 28 | #define MAILBOX_EXIT 0xfb | |
| 29 | ||
| 30 | /* Another CPU called romvec->pv_enter(), you should call | |
| 31 | * prom_cpuidle() when this is seen. | |
| 32 | */ | |
| 33 | #define MAILBOX_GOSPIN 0xfc | |
| 34 | ||
| 35 | /* Another CPU has hit a breakpoint either into kadb or the prom | |
| 36 | * itself. Just like MAILBOX_GOSPIN, you should call prom_cpuidle() | |
| 37 | * at this point. | |
| 38 | */ | |
| 39 | #define MAILBOX_BPT_SPIN 0xfd | |
| 40 | ||
| 41 | /* Oh geese, some other nitwit got a damn watchdog reset. The party's | |
| 42 | * over so go call prom_stopcpu(). | |
| 43 | */ | |
| 44 | #define MAILBOX_WDOG_STOP 0xfe | |
| 45 | ||
| 46 | #ifndef __ASSEMBLY__ | |
| 47 | ||
| 48 | /* Handy macro's to determine a cpu's state. */ | |
| 49 | ||
| 50 | /* Is the cpu still in Power On Self Test? */ | |
| 51 | #define MBOX_POST_P(letter) ((letter) >= 0x00 && (letter) <= 0x7f) | |
| 52 | ||
| 53 | /* Is the cpu at the 'ok' prompt of the PROM? */ | |
| 54 | #define MBOX_PROMPROMPT_P(letter) ((letter) >= 0x80 && (letter) <= 0x8f) | |
| 55 | ||
| 56 | /* Is the cpu spinning in the PROM? */ | |
| 57 | #define MBOX_PROMSPIN_P(letter) ((letter) >= 0x90 && (letter) <= 0xef) | |
| 58 | ||
| 59 | /* Sanity check... This is junk mail, throw it out. */ | |
| 60 | #define MBOX_BOGON_P(letter) ((letter) >= 0xf1 && (letter) <= 0xfa) | |
| 61 | ||
| 62 | /* Is the cpu actively running an application/kernel-code? */ | |
| 63 | #define MBOX_RUNNING_P(letter) ((letter) == MAILBOX_ISRUNNING) | |
| 64 | ||
| 65 | #endif /* !(__ASSEMBLY__) */ | |
| 66 | ||
| 67 | #endif /* !(_SPARC_MPMBOX_H) */ |