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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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453 lines
8.9 KiB
C
453 lines
8.9 KiB
C
/*
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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 <linux/module.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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static int prom_service_exists(const char *service_name)
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{
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unsigned long args[5];
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args[0] = (unsigned long) "test";
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args[1] = 1;
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args[2] = 1;
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args[3] = (unsigned long) service_name;
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args[4] = (unsigned long) -1;
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p1275_cmd_direct(args);
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if (args[4])
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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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unsigned long args[3];
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if (!prom_service_exists(svc))
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return;
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args[0] = (unsigned long) svc;
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args[1] = 0;
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args[2] = 0;
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p1275_cmd_direct(args);
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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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unsigned long args[4];
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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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args[0] = (unsigned long) "boot";
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args[1] = 1;
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args[2] = 0;
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args[3] = (unsigned long) bcommand;
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p1275_cmd_direct(args);
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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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unsigned long args[5];
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if (!fstring || fstring[0] == 0)
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return;
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args[0] = (unsigned long) "interpret";
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args[1] = 1;
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args[2] = 1;
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args[3] = (unsigned long) fstring;
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args[4] = (unsigned long) -1;
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p1275_cmd_direct(args);
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}
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EXPORT_SYMBOL(prom_feval);
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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 args[3];
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unsigned long flags;
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local_irq_save(flags);
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#ifdef CONFIG_SMP
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smp_capture();
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#endif
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args[0] = (unsigned long) "enter";
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args[1] = 0;
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args[2] = 0;
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p1275_cmd_direct(args);
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#ifdef CONFIG_SMP
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smp_release();
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#endif
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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 notrace prom_halt(void)
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{
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unsigned long args[3];
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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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args[0] = (unsigned long) "exit";
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args[1] = 0;
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args[2] = 0;
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p1275_cmd_direct(args);
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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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unsigned long args[3];
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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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args[0] = (unsigned long) "SUNW,power-off";
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args[1] = 0;
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args[2] = 0;
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p1275_cmd_direct(args);
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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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/* 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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int prom_get_mmu_ihandle(void)
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{
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phandle node;
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int 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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phandle node;
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int 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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static long tlb_load(const char *type, unsigned long index,
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unsigned long tte_data, unsigned long vaddr)
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{
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unsigned long args[9];
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args[0] = (unsigned long) prom_callmethod_name;
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args[1] = 5;
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args[2] = 1;
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args[3] = (unsigned long) type;
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args[4] = (unsigned int) prom_get_mmu_ihandle();
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args[5] = vaddr;
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args[6] = tte_data;
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args[7] = index;
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args[8] = (unsigned long) -1;
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p1275_cmd_direct(args);
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return (long) args[8];
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}
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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 tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
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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 tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
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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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unsigned long args[11];
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int ret;
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args[0] = (unsigned long) prom_callmethod_name;
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args[1] = 7;
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args[2] = 1;
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args[3] = (unsigned long) prom_map_name;
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args[4] = (unsigned int) prom_get_mmu_ihandle();
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args[5] = (unsigned int) mode;
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args[6] = size;
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args[7] = vaddr;
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args[8] = 0;
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args[9] = paddr;
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args[10] = (unsigned long) -1;
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p1275_cmd_direct(args);
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ret = (int) args[10];
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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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unsigned long args[7];
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args[0] = (unsigned long) prom_callmethod_name;
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args[1] = 4;
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args[2] = 0;
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args[3] = (unsigned long) prom_unmap_name;
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args[4] = (unsigned int) prom_get_mmu_ihandle();
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args[5] = size;
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args[6] = vaddr;
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p1275_cmd_direct(args);
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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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int prom_retain(const char *name, unsigned long size,
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unsigned long align, unsigned long *paddr)
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{
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unsigned long args[11];
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args[0] = (unsigned long) prom_callmethod_name;
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args[1] = 5;
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args[2] = 3;
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args[3] = (unsigned long) "SUNW,retain";
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args[4] = (unsigned int) prom_get_memory_ihandle();
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args[5] = align;
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args[6] = size;
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args[7] = (unsigned long) name;
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args[8] = (unsigned long) -1;
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args[9] = (unsigned long) -1;
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args[10] = (unsigned long) -1;
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p1275_cmd_direct(args);
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if (args[8])
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return (int) args[8];
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/* Next we get "phys_high" then "phys_low". On 64-bit
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* the phys_high cell is don't care since the phys_low
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* cell has the full value.
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*/
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*paddr = args[10];
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return 0;
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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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unsigned long args[12];
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args[0] = (unsigned long) prom_callmethod_name;
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args[1] = 7;
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args[2] = 2;
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args[3] = (unsigned long) "SUNW,get-unumber";
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args[4] = (unsigned int) prom_get_memory_ihandle();
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args[5] = buflen;
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args[6] = (unsigned long) buf;
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args[7] = 0;
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args[8] = phys_addr;
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args[9] = (unsigned int) syndrome_code;
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args[10] = (unsigned long) -1;
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args[11] = (unsigned long) -1;
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p1275_cmd_direct(args);
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return (int) args[10];
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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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unsigned long args[3];
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args[0] = (unsigned long) "SUNW,sleep-self";
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args[1] = 0;
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args[2] = 0;
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p1275_cmd_direct(args);
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}
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int prom_sleepsystem(void)
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{
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unsigned long args[4];
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args[0] = (unsigned long) "SUNW,sleep-system";
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args[1] = 0;
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args[2] = 1;
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args[3] = (unsigned long) -1;
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p1275_cmd_direct(args);
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return (int) args[3];
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}
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int prom_wakeupsystem(void)
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{
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unsigned long args[4];
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args[0] = (unsigned long) "SUNW,wakeup-system";
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args[1] = 0;
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args[2] = 1;
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args[3] = (unsigned long) -1;
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p1275_cmd_direct(args);
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return (int) args[3];
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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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unsigned long args[6];
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args[0] = (unsigned long) "SUNW,start-cpu";
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args[1] = 3;
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args[2] = 0;
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args[3] = (unsigned int) cpunode;
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args[4] = pc;
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args[5] = arg;
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p1275_cmd_direct(args);
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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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unsigned long args[6];
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args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
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args[1] = 3;
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args[2] = 0;
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args[3] = (unsigned int) cpuid;
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args[4] = pc;
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args[5] = arg;
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p1275_cmd_direct(args);
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}
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void prom_stopcpu_cpuid(int cpuid)
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{
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unsigned long args[4];
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args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
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args[1] = 1;
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args[2] = 0;
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args[3] = (unsigned int) cpuid;
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p1275_cmd_direct(args);
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}
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void prom_stopself(void)
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{
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unsigned long args[3];
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args[0] = (unsigned long) "SUNW,stop-self";
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args[1] = 0;
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args[2] = 0;
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p1275_cmd_direct(args);
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}
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void prom_idleself(void)
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{
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unsigned long args[3];
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args[0] = (unsigned long) "SUNW,idle-self";
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args[1] = 0;
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args[2] = 0;
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p1275_cmd_direct(args);
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}
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void prom_resumecpu(int cpunode)
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{
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unsigned long args[4];
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args[0] = (unsigned long) "SUNW,resume-cpu";
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args[1] = 1;
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args[2] = 0;
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args[3] = (unsigned int) cpunode;
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p1275_cmd_direct(args);
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}
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#endif
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