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-rw-r--r--arch/sparc/prom/misc_64.c335
1 files changed, 335 insertions, 0 deletions
diff --git a/arch/sparc/prom/misc_64.c b/arch/sparc/prom/misc_64.c
new file mode 100644
index 00000000000..9b0c0760901
--- /dev/null
+++ b/arch/sparc/prom/misc_64.c
@@ -0,0 +1,335 @@
+/*
+ * 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
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