| /* | |
| * mpmbox.h: Interface and defines for the OpenProm mailbox | |
| * facilities for MP machines under Linux. | |
| * | |
| * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
| */ | |
| #ifndef _SPARC_MPMBOX_H | |
| #define _SPARC_MPMBOX_H | |
| /* The prom allocates, for each CPU on the machine an unsigned | |
| * byte in physical ram. You probe the device tree prom nodes | |
| * for these values. The purpose of this byte is to be able to | |
| * pass messages from one cpu to another. | |
| */ | |
| /* These are the main message types we have to look for in our | |
| * Cpu mailboxes, based upon these values we decide what course | |
| * of action to take. | |
| */ | |
| /* The CPU is executing code in the kernel. */ | |
| #define MAILBOX_ISRUNNING 0xf0 | |
| /* Another CPU called romvec->pv_exit(), you should call | |
| * prom_stopcpu() when you see this in your mailbox. | |
| */ | |
| #define MAILBOX_EXIT 0xfb | |
| /* Another CPU called romvec->pv_enter(), you should call | |
| * prom_cpuidle() when this is seen. | |
| */ | |
| #define MAILBOX_GOSPIN 0xfc | |
| /* Another CPU has hit a breakpoint either into kadb or the prom | |
| * itself. Just like MAILBOX_GOSPIN, you should call prom_cpuidle() | |
| * at this point. | |
| */ | |
| #define MAILBOX_BPT_SPIN 0xfd | |
| /* Oh geese, some other nitwit got a damn watchdog reset. The party's | |
| * over so go call prom_stopcpu(). | |
| */ | |
| #define MAILBOX_WDOG_STOP 0xfe | |
| #ifndef __ASSEMBLY__ | |
| /* Handy macro's to determine a cpu's state. */ | |
| /* Is the cpu still in Power On Self Test? */ | |
| #define MBOX_POST_P(letter) ((letter) >= 0x00 && (letter) <= 0x7f) | |
| /* Is the cpu at the 'ok' prompt of the PROM? */ | |
| #define MBOX_PROMPROMPT_P(letter) ((letter) >= 0x80 && (letter) <= 0x8f) | |
| /* Is the cpu spinning in the PROM? */ | |
| #define MBOX_PROMSPIN_P(letter) ((letter) >= 0x90 && (letter) <= 0xef) | |
| /* Sanity check... This is junk mail, throw it out. */ | |
| #define MBOX_BOGON_P(letter) ((letter) >= 0xf1 && (letter) <= 0xfa) | |
| /* Is the cpu actively running an application/kernel-code? */ | |
| #define MBOX_RUNNING_P(letter) ((letter) == MAILBOX_ISRUNNING) | |
| #endif /* !(__ASSEMBLY__) */ | |
| #endif /* !(_SPARC_MPMBOX_H) */ |