+++ /dev/null
-/*
- * misc.c: Miscellaneous prom functions that don't belong
- * anywhere else.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- */
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <asm/openprom.h>
-#include <asm/oplib.h>
-#include <asm/system.h>
-#include <asm/ldc.h>
-
-int prom_service_exists(const char *service_name)
-{
- int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
- P1275_INOUT(1, 1), service_name);
-
- if (err)
- return 0;
- return 1;
-}
-
-void prom_sun4v_guest_soft_state(void)
-{
- const char *svc = "SUNW,soft-state-supported";
-
- if (!prom_service_exists(svc))
- return;
- p1275_cmd(svc, P1275_INOUT(0, 0));
-}
-
-/* Reset and reboot the machine with the command 'bcommand'. */
-void prom_reboot(const char *bcommand)
-{
-#ifdef CONFIG_SUN_LDOMS
- if (ldom_domaining_enabled)
- ldom_reboot(bcommand);
-#endif
- p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) |
- P1275_INOUT(1, 0), bcommand);
-}
-
-/* Forth evaluate the expression contained in 'fstring'. */
-void prom_feval(const char *fstring)
-{
- if (!fstring || fstring[0] == 0)
- return;
- p1275_cmd("interpret", P1275_ARG(0, P1275_ARG_IN_STRING) |
- P1275_INOUT(1, 1), fstring);
-}
-
-#ifdef CONFIG_SMP
-extern void smp_capture(void);
-extern void smp_release(void);
-#endif
-
-/* Drop into the prom, with the chance to continue with the 'go'
- * prom command.
- */
-void prom_cmdline(void)
-{
- unsigned long flags;
-
- local_irq_save(flags);
-
-#ifdef CONFIG_SMP
- smp_capture();
-#endif
-
- p1275_cmd("enter", P1275_INOUT(0, 0));
-
-#ifdef CONFIG_SMP
- smp_release();
-#endif
-
- local_irq_restore(flags);
-}
-
-/* Drop into the prom, but completely terminate the program.
- * No chance of continuing.
- */
-void prom_halt(void)
-{
-#ifdef CONFIG_SUN_LDOMS
- if (ldom_domaining_enabled)
- ldom_power_off();
-#endif
-again:
- p1275_cmd("exit", P1275_INOUT(0, 0));
- goto again; /* PROM is out to get me -DaveM */
-}
-
-void prom_halt_power_off(void)
-{
-#ifdef CONFIG_SUN_LDOMS
- if (ldom_domaining_enabled)
- ldom_power_off();
-#endif
- p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));
-
- /* if nothing else helps, we just halt */
- prom_halt();
-}
-
-/* Set prom sync handler to call function 'funcp'. */
-void prom_setcallback(callback_func_t funcp)
-{
- if (!funcp)
- return;
- p1275_cmd("set-callback", P1275_ARG(0, P1275_ARG_IN_FUNCTION) |
- P1275_INOUT(1, 1), funcp);
-}
-
-/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
- * format type. 'num_bytes' is the number of bytes that your idbuf
- * has space for. Returns 0xff on error.
- */
-unsigned char prom_get_idprom(char *idbuf, int num_bytes)
-{
- int len;
-
- len = prom_getproplen(prom_root_node, "idprom");
- if ((len >num_bytes) || (len == -1))
- return 0xff;
- if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
- return idbuf[0];
-
- return 0xff;
-}
-
-int prom_get_mmu_ihandle(void)
-{
- int node, ret;
-
- if (prom_mmu_ihandle_cache != 0)
- return prom_mmu_ihandle_cache;
-
- node = prom_finddevice(prom_chosen_path);
- ret = prom_getint(node, prom_mmu_name);
- if (ret == -1 || ret == 0)
- prom_mmu_ihandle_cache = -1;
- else
- prom_mmu_ihandle_cache = ret;
-
- return ret;
-}
-
-static int prom_get_memory_ihandle(void)
-{
- static int memory_ihandle_cache;
- int node, ret;
-
- if (memory_ihandle_cache != 0)
- return memory_ihandle_cache;
-
- node = prom_finddevice("/chosen");
- ret = prom_getint(node, "memory");
- if (ret == -1 || ret == 0)
- memory_ihandle_cache = -1;
- else
- memory_ihandle_cache = ret;
-
- return ret;
-}
-
-/* Load explicit I/D TLB entries. */
-long prom_itlb_load(unsigned long index,
- unsigned long tte_data,
- unsigned long vaddr)
-{
- return p1275_cmd(prom_callmethod_name,
- (P1275_ARG(0, P1275_ARG_IN_STRING) |
- P1275_ARG(2, P1275_ARG_IN_64B) |
- P1275_ARG(3, P1275_ARG_IN_64B) |
- P1275_INOUT(5, 1)),
- "SUNW,itlb-load",
- prom_get_mmu_ihandle(),
- /* And then our actual args are pushed backwards. */
- vaddr,
- tte_data,
- index);
-}
-
-long prom_dtlb_load(unsigned long index,
- unsigned long tte_data,
- unsigned long vaddr)
-{
- return p1275_cmd(prom_callmethod_name,
- (P1275_ARG(0, P1275_ARG_IN_STRING) |
- P1275_ARG(2, P1275_ARG_IN_64B) |
- P1275_ARG(3, P1275_ARG_IN_64B) |
- P1275_INOUT(5, 1)),
- "SUNW,dtlb-load",
- prom_get_mmu_ihandle(),
- /* And then our actual args are pushed backwards. */
- vaddr,
- tte_data,
- index);
-}
-
-int prom_map(int mode, unsigned long size,
- unsigned long vaddr, unsigned long paddr)
-{
- int ret = p1275_cmd(prom_callmethod_name,
- (P1275_ARG(0, P1275_ARG_IN_STRING) |
- P1275_ARG(3, P1275_ARG_IN_64B) |
- P1275_ARG(4, P1275_ARG_IN_64B) |
- P1275_ARG(6, P1275_ARG_IN_64B) |
- P1275_INOUT(7, 1)),
- prom_map_name,
- prom_get_mmu_ihandle(),
- mode,
- size,
- vaddr,
- 0,
- paddr);
-
- if (ret == 0)
- ret = -1;
- return ret;
-}
-
-void prom_unmap(unsigned long size, unsigned long vaddr)
-{
- p1275_cmd(prom_callmethod_name,
- (P1275_ARG(0, P1275_ARG_IN_STRING) |
- P1275_ARG(2, P1275_ARG_IN_64B) |
- P1275_ARG(3, P1275_ARG_IN_64B) |
- P1275_INOUT(4, 0)),
- prom_unmap_name,
- prom_get_mmu_ihandle(),
- size,
- vaddr);
-}
-
-/* Set aside physical memory which is not touched or modified
- * across soft resets.
- */
-unsigned long prom_retain(const char *name,
- unsigned long pa_low, unsigned long pa_high,
- long size, long align)
-{
- /* XXX I don't think we return multiple values correctly.
- * XXX OBP supposedly returns pa_low/pa_high here, how does
- * XXX it work?
- */
-
- /* If align is zero, the pa_low/pa_high args are passed,
- * else they are not.
- */
- if (align == 0)
- return p1275_cmd("SUNW,retain",
- (P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(5, 2)),
- name, pa_low, pa_high, size, align);
- else
- return p1275_cmd("SUNW,retain",
- (P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(3, 2)),
- name, size, align);
-}
-
-/* Get "Unumber" string for the SIMM at the given
- * memory address. Usually this will be of the form
- * "Uxxxx" where xxxx is a decimal number which is
- * etched into the motherboard next to the SIMM slot
- * in question.
- */
-int prom_getunumber(int syndrome_code,
- unsigned long phys_addr,
- char *buf, int buflen)
-{
- return p1275_cmd(prom_callmethod_name,
- (P1275_ARG(0, P1275_ARG_IN_STRING) |
- P1275_ARG(3, P1275_ARG_OUT_BUF) |
- P1275_ARG(6, P1275_ARG_IN_64B) |
- P1275_INOUT(8, 2)),
- "SUNW,get-unumber", prom_get_memory_ihandle(),
- buflen, buf, P1275_SIZE(buflen),
- 0, phys_addr, syndrome_code);
-}
-
-/* Power management extensions. */
-void prom_sleepself(void)
-{
- p1275_cmd("SUNW,sleep-self", P1275_INOUT(0, 0));
-}
-
-int prom_sleepsystem(void)
-{
- return p1275_cmd("SUNW,sleep-system", P1275_INOUT(0, 1));
-}
-
-int prom_wakeupsystem(void)
-{
- return p1275_cmd("SUNW,wakeup-system", P1275_INOUT(0, 1));
-}
-
-#ifdef CONFIG_SMP
-void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
-{
- p1275_cmd("SUNW,start-cpu", P1275_INOUT(3, 0), cpunode, pc, arg);
-}
-
-void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
-{
- p1275_cmd("SUNW,start-cpu-by-cpuid", P1275_INOUT(3, 0),
- cpuid, pc, arg);
-}
-
-void prom_stopcpu_cpuid(int cpuid)
-{
- p1275_cmd("SUNW,stop-cpu-by-cpuid", P1275_INOUT(1, 0),
- cpuid);
-}
-
-void prom_stopself(void)
-{
- p1275_cmd("SUNW,stop-self", P1275_INOUT(0, 0));
-}
-
-void prom_idleself(void)
-{
- p1275_cmd("SUNW,idle-self", P1275_INOUT(0, 0));
-}
-
-void prom_resumecpu(int cpunode)
-{
- p1275_cmd("SUNW,resume-cpu", P1275_INOUT(1, 0), cpunode);
-}
-#endif
git.samba.org / sfrench / cifs-2.6.git / blobdiff