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c73fcc846c
The current scheme works on static interpretation of text names, which
is wrong.
The output-device setting, for example, must be resolved via an alias
or similar to a full path name to the console device.
Paths also contain an optional set of 'options', which starts with a
colon at the end of the path. The option area is used to specify
which of two serial ports ('a' or 'b') the path refers to when a
device node drives multiple ports. 'a' is assumed if the option
specification is missing.
This was caught by the UltraSPARC-T1 simulator. The 'output-device'
property was set to 'ttya' and we didn't pick upon the fact that this
is an OBP alias set to '/virtual-devices/console'. Instead we saw it
as the first serial console device, instead of the hypervisor console.
The infrastructure is now there to take advantage of this to resolve
the console correctly even in multi-head situations in fbcon too.
Thanks to Greg Onufer for the bug report.
Signed-off-by: David S. Miller <davem@davemloft.net>
360 lines
8.1 KiB
C
360 lines
8.1 KiB
C
/* $Id: misc.c,v 1.20 2001/09/21 03:17:07 kanoj Exp $
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* misc.c: Miscellaneous prom functions that don't belong
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* anywhere else.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <asm/openprom.h>
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#include <asm/oplib.h>
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#include <asm/system.h>
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#include <asm/ldc.h>
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int prom_service_exists(const char *service_name)
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{
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int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
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P1275_INOUT(1, 1), service_name);
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if (err)
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return 0;
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return 1;
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}
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void prom_sun4v_guest_soft_state(void)
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{
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const char *svc = "SUNW,soft-state-supported";
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if (!prom_service_exists(svc))
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return;
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p1275_cmd(svc, P1275_INOUT(0, 0));
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}
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/* Reset and reboot the machine with the command 'bcommand'. */
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void prom_reboot(const char *bcommand)
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{
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#ifdef CONFIG_SUN_LDOMS
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if (ldom_domaining_enabled)
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ldom_reboot(bcommand);
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#endif
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p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) |
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P1275_INOUT(1, 0), bcommand);
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}
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/* Forth evaluate the expression contained in 'fstring'. */
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void prom_feval(const char *fstring)
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{
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if (!fstring || fstring[0] == 0)
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return;
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p1275_cmd("interpret", P1275_ARG(0, P1275_ARG_IN_STRING) |
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P1275_INOUT(1, 1), fstring);
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}
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/* We want to do this more nicely some day. */
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extern void (*prom_palette)(int);
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#ifdef CONFIG_SMP
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extern void smp_capture(void);
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extern void smp_release(void);
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#endif
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/* Drop into the prom, with the chance to continue with the 'go'
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* prom command.
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*/
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void prom_cmdline(void)
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{
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unsigned long flags;
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local_irq_save(flags);
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if (prom_palette)
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prom_palette(1);
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#ifdef CONFIG_SMP
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smp_capture();
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#endif
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p1275_cmd("enter", P1275_INOUT(0, 0));
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#ifdef CONFIG_SMP
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smp_release();
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#endif
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if (prom_palette)
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prom_palette(0);
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local_irq_restore(flags);
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}
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/* Drop into the prom, but completely terminate the program.
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* No chance of continuing.
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*/
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void prom_halt(void)
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{
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#ifdef CONFIG_SUN_LDOMS
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if (ldom_domaining_enabled)
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ldom_power_off();
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#endif
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again:
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p1275_cmd("exit", P1275_INOUT(0, 0));
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goto again; /* PROM is out to get me -DaveM */
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}
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void prom_halt_power_off(void)
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{
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#ifdef CONFIG_SUN_LDOMS
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if (ldom_domaining_enabled)
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ldom_power_off();
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#endif
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p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));
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/* if nothing else helps, we just halt */
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prom_halt();
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}
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/* Set prom sync handler to call function 'funcp'. */
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void prom_setcallback(callback_func_t funcp)
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{
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if (!funcp)
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return;
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p1275_cmd("set-callback", P1275_ARG(0, P1275_ARG_IN_FUNCTION) |
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P1275_INOUT(1, 1), funcp);
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}
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/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
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* format type. 'num_bytes' is the number of bytes that your idbuf
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* has space for. Returns 0xff on error.
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*/
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unsigned char prom_get_idprom(char *idbuf, int num_bytes)
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{
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int len;
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len = prom_getproplen(prom_root_node, "idprom");
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if ((len >num_bytes) || (len == -1))
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return 0xff;
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if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
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return idbuf[0];
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return 0xff;
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}
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/* Install Linux trap table so PROM uses that instead of its own. */
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void prom_set_trap_table(unsigned long tba)
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{
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p1275_cmd("SUNW,set-trap-table",
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(P1275_ARG(0, P1275_ARG_IN_64B) |
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P1275_INOUT(1, 0)), tba);
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}
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void prom_set_trap_table_sun4v(unsigned long tba, unsigned long mmfsa)
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{
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p1275_cmd("SUNW,set-trap-table",
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(P1275_ARG(0, P1275_ARG_IN_64B) |
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P1275_ARG(1, P1275_ARG_IN_64B) |
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P1275_INOUT(2, 0)), tba, mmfsa);
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}
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int prom_get_mmu_ihandle(void)
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{
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int node, ret;
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if (prom_mmu_ihandle_cache != 0)
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return prom_mmu_ihandle_cache;
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node = prom_finddevice(prom_chosen_path);
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ret = prom_getint(node, prom_mmu_name);
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if (ret == -1 || ret == 0)
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prom_mmu_ihandle_cache = -1;
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else
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prom_mmu_ihandle_cache = ret;
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return ret;
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}
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static int prom_get_memory_ihandle(void)
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{
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static int memory_ihandle_cache;
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int node, ret;
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if (memory_ihandle_cache != 0)
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return memory_ihandle_cache;
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node = prom_finddevice("/chosen");
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ret = prom_getint(node, "memory");
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if (ret == -1 || ret == 0)
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memory_ihandle_cache = -1;
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else
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memory_ihandle_cache = ret;
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return ret;
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}
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/* Load explicit I/D TLB entries. */
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long prom_itlb_load(unsigned long index,
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unsigned long tte_data,
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unsigned long vaddr)
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{
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return p1275_cmd(prom_callmethod_name,
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(P1275_ARG(0, P1275_ARG_IN_STRING) |
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P1275_ARG(2, P1275_ARG_IN_64B) |
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P1275_ARG(3, P1275_ARG_IN_64B) |
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P1275_INOUT(5, 1)),
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"SUNW,itlb-load",
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prom_get_mmu_ihandle(),
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/* And then our actual args are pushed backwards. */
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vaddr,
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tte_data,
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index);
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}
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long prom_dtlb_load(unsigned long index,
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unsigned long tte_data,
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unsigned long vaddr)
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{
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return p1275_cmd(prom_callmethod_name,
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(P1275_ARG(0, P1275_ARG_IN_STRING) |
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P1275_ARG(2, P1275_ARG_IN_64B) |
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P1275_ARG(3, P1275_ARG_IN_64B) |
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P1275_INOUT(5, 1)),
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"SUNW,dtlb-load",
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prom_get_mmu_ihandle(),
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/* And then our actual args are pushed backwards. */
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vaddr,
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tte_data,
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index);
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}
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int prom_map(int mode, unsigned long size,
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unsigned long vaddr, unsigned long paddr)
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{
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int ret = p1275_cmd(prom_callmethod_name,
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(P1275_ARG(0, P1275_ARG_IN_STRING) |
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P1275_ARG(3, P1275_ARG_IN_64B) |
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P1275_ARG(4, P1275_ARG_IN_64B) |
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P1275_ARG(6, P1275_ARG_IN_64B) |
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P1275_INOUT(7, 1)),
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prom_map_name,
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prom_get_mmu_ihandle(),
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mode,
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size,
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vaddr,
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0,
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paddr);
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if (ret == 0)
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ret = -1;
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return ret;
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}
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void prom_unmap(unsigned long size, unsigned long vaddr)
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{
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p1275_cmd(prom_callmethod_name,
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(P1275_ARG(0, P1275_ARG_IN_STRING) |
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P1275_ARG(2, P1275_ARG_IN_64B) |
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P1275_ARG(3, P1275_ARG_IN_64B) |
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P1275_INOUT(4, 0)),
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prom_unmap_name,
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prom_get_mmu_ihandle(),
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size,
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vaddr);
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}
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/* Set aside physical memory which is not touched or modified
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* across soft resets.
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*/
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unsigned long prom_retain(const char *name,
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unsigned long pa_low, unsigned long pa_high,
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long size, long align)
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{
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/* XXX I don't think we return multiple values correctly.
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* XXX OBP supposedly returns pa_low/pa_high here, how does
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* XXX it work?
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*/
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/* If align is zero, the pa_low/pa_high args are passed,
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* else they are not.
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*/
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if (align == 0)
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return p1275_cmd("SUNW,retain",
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(P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(5, 2)),
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name, pa_low, pa_high, size, align);
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else
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return p1275_cmd("SUNW,retain",
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(P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(3, 2)),
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name, size, align);
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}
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/* Get "Unumber" string for the SIMM at the given
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* memory address. Usually this will be of the form
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* "Uxxxx" where xxxx is a decimal number which is
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* etched into the motherboard next to the SIMM slot
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* in question.
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*/
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int prom_getunumber(int syndrome_code,
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unsigned long phys_addr,
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char *buf, int buflen)
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{
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return p1275_cmd(prom_callmethod_name,
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(P1275_ARG(0, P1275_ARG_IN_STRING) |
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P1275_ARG(3, P1275_ARG_OUT_BUF) |
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P1275_ARG(6, P1275_ARG_IN_64B) |
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P1275_INOUT(8, 2)),
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"SUNW,get-unumber", prom_get_memory_ihandle(),
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buflen, buf, P1275_SIZE(buflen),
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0, phys_addr, syndrome_code);
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}
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/* Power management extensions. */
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void prom_sleepself(void)
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{
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p1275_cmd("SUNW,sleep-self", P1275_INOUT(0, 0));
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}
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int prom_sleepsystem(void)
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{
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return p1275_cmd("SUNW,sleep-system", P1275_INOUT(0, 1));
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}
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int prom_wakeupsystem(void)
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{
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return p1275_cmd("SUNW,wakeup-system", P1275_INOUT(0, 1));
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}
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#ifdef CONFIG_SMP
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void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
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{
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p1275_cmd("SUNW,start-cpu", P1275_INOUT(3, 0), cpunode, pc, arg);
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}
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void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
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{
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p1275_cmd("SUNW,start-cpu-by-cpuid", P1275_INOUT(3, 0),
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cpuid, pc, arg);
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}
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void prom_stopcpu_cpuid(int cpuid)
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{
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p1275_cmd("SUNW,stop-cpu-by-cpuid", P1275_INOUT(1, 0),
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cpuid);
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}
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void prom_stopself(void)
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{
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p1275_cmd("SUNW,stop-self", P1275_INOUT(0, 0));
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}
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void prom_idleself(void)
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{
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p1275_cmd("SUNW,idle-self", P1275_INOUT(0, 0));
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}
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void prom_resumecpu(int cpunode)
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{
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p1275_cmd("SUNW,resume-cpu", P1275_INOUT(1, 0), cpunode);
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}
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#endif
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