Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 447 insertions, 0 deletions

diff --git a/arch/sparc/prom/misc_64.c b/arch/sparc/prom/misc_64.c
new file mode 100644
index 000000000..aed94cd4a
--- /dev/null
+++ b/arch/sparc/prom/misc_64.c
@@ -0,0 +1,447 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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 <linux/module.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/ldc.h>
+
+static int prom_service_exists(const char *service_name)
+{
+	unsigned long args[5];
+
+	args[0] = (unsigned long) "test";
+	args[1] = 1;
+	args[2] = 1;
+	args[3] = (unsigned long) service_name;
+	args[4] = (unsigned long) -1;
+
+	p1275_cmd_direct(args);
+
+	if (args[4])
+		return 0;
+	return 1;
+}
+
+void prom_sun4v_guest_soft_state(void)
+{
+	const char *svc = "SUNW,soft-state-supported";
+	unsigned long args[3];
+
+	if (!prom_service_exists(svc))
+		return;
+	args[0] = (unsigned long) svc;
+	args[1] = 0;
+	args[2] = 0;
+	p1275_cmd_direct(args);
+}
+
+/* Reset and reboot the machine with the command 'bcommand'. */
+void prom_reboot(const char *bcommand)
+{
+	unsigned long args[4];
+
+#ifdef CONFIG_SUN_LDOMS
+	if (ldom_domaining_enabled)
+		ldom_reboot(bcommand);
+#endif
+	args[0] = (unsigned long) "boot";
+	args[1] = 1;
+	args[2] = 0;
+	args[3] = (unsigned long) bcommand;
+
+	p1275_cmd_direct(args);
+}
+
+/* Forth evaluate the expression contained in 'fstring'. */
+void prom_feval(const char *fstring)
+{
+	unsigned long args[5];
+
+	if (!fstring || fstring[0] == 0)
+		return;
+	args[0] = (unsigned long) "interpret";
+	args[1] = 1;
+	args[2] = 1;
+	args[3] = (unsigned long) fstring;
+	args[4] = (unsigned long) -1;
+
+	p1275_cmd_direct(args);
+}
+EXPORT_SYMBOL(prom_feval);
+
+/* Drop into the prom, with the chance to continue with the 'go'
+ * prom command.
+ */
+void prom_cmdline(void)
+{
+	unsigned long args[3];
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+#ifdef CONFIG_SMP
+	smp_capture();
+#endif
+
+	args[0] = (unsigned long) "enter";
+	args[1] = 0;
+	args[2] = 0;
+
+	p1275_cmd_direct(args);
+
+#ifdef CONFIG_SMP
+	smp_release();
+#endif
+
+	local_irq_restore(flags);
+}
+
+/* Drop into the prom, but completely terminate the program.
+ * No chance of continuing.
+ */
+void notrace prom_halt(void)
+{
+	unsigned long args[3];
+
+#ifdef CONFIG_SUN_LDOMS
+	if (ldom_domaining_enabled)
+		ldom_power_off();
+#endif
+again:
+	args[0] = (unsigned long) "exit";
+	args[1] = 0;
+	args[2] = 0;
+	p1275_cmd_direct(args);
+	goto again; /* PROM is out to get me -DaveM */
+}
+
+void prom_halt_power_off(void)
+{
+	unsigned long args[3];
+
+#ifdef CONFIG_SUN_LDOMS
+	if (ldom_domaining_enabled)
+		ldom_power_off();
+#endif
+	args[0] = (unsigned long) "SUNW,power-off";
+	args[1] = 0;
+	args[2] = 0;
+	p1275_cmd_direct(args);
+
+	/* if nothing else helps, we just halt */
+	prom_halt();
+}
+
+/* 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)
+{
+	phandle node;
+	int 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;
+	phandle node;
+	int 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. */
+static long tlb_load(const char *type, unsigned long index,
+		     unsigned long tte_data, unsigned long vaddr)
+{
+	unsigned long args[9];
+
+	args[0] = (unsigned long) prom_callmethod_name;
+	args[1] = 5;
+	args[2] = 1;
+	args[3] = (unsigned long) type;
+	args[4] = (unsigned int) prom_get_mmu_ihandle();
+	args[5] = vaddr;
+	args[6] = tte_data;
+	args[7] = index;
+	args[8] = (unsigned long) -1;
+
+	p1275_cmd_direct(args);
+
+	return (long) args[8];
+}
+
+long prom_itlb_load(unsigned long index,
+		    unsigned long tte_data,
+		    unsigned long vaddr)
+{
+	return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
+}
+
+long prom_dtlb_load(unsigned long index,
+		    unsigned long tte_data,
+		    unsigned long vaddr)
+{
+	return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
+}
+
+int prom_map(int mode, unsigned long size,
+	     unsigned long vaddr, unsigned long paddr)
+{
+	unsigned long args[11];
+	int ret;
+
+	args[0] = (unsigned long) prom_callmethod_name;
+	args[1] = 7;
+	args[2] = 1;
+	args[3] = (unsigned long) prom_map_name;
+	args[4] = (unsigned int) prom_get_mmu_ihandle();
+	args[5] = (unsigned int) mode;
+	args[6] = size;
+	args[7] = vaddr;
+	args[8] = 0;
+	args[9] = paddr;
+	args[10] = (unsigned long) -1;
+
+	p1275_cmd_direct(args);
+
+	ret = (int) args[10];
+	if (ret == 0)
+		ret = -1;
+	return ret;
+}
+
+void prom_unmap(unsigned long size, unsigned long vaddr)
+{
+	unsigned long args[7];
+
+	args[0] = (unsigned long) prom_callmethod_name;
+	args[1] = 4;
+	args[2] = 0;
+	args[3] = (unsigned long) prom_unmap_name;
+	args[4] = (unsigned int) prom_get_mmu_ihandle();
+	args[5] = size;
+	args[6] = vaddr;
+
+	p1275_cmd_direct(args);
+}
+
+/* Set aside physical memory which is not touched or modified
+ * across soft resets.
+ */
+int prom_retain(const char *name, unsigned long size,
+		unsigned long align, unsigned long *paddr)
+{
+	unsigned long args[11];
+
+	args[0] = (unsigned long) prom_callmethod_name;
+	args[1] = 5;
+	args[2] = 3;
+	args[3] = (unsigned long) "SUNW,retain";
+	args[4] = (unsigned int) prom_get_memory_ihandle();
+	args[5] = align;
+	args[6] = size;
+	args[7] = (unsigned long) name;
+	args[8] = (unsigned long) -1;
+	args[9] = (unsigned long) -1;
+	args[10] = (unsigned long) -1;
+
+	p1275_cmd_direct(args);
+
+	if (args[8])
+		return (int) args[8];
+
+	/* Next we get "phys_high" then "phys_low".  On 64-bit
+	 * the phys_high cell is don't care since the phys_low
+	 * cell has the full value.
+	 */
+	*paddr = args[10];
+
+	return 0;
+}
+
+/* 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)
+{
+	unsigned long args[12];
+
+	args[0] = (unsigned long) prom_callmethod_name;
+	args[1] = 7;
+	args[2] = 2;
+	args[3] = (unsigned long) "SUNW,get-unumber";
+	args[4] = (unsigned int) prom_get_memory_ihandle();
+	args[5] = buflen;
+	args[6] = (unsigned long) buf;
+	args[7] = 0;
+	args[8] = phys_addr;
+	args[9] = (unsigned int) syndrome_code;
+	args[10] = (unsigned long) -1;
+	args[11] = (unsigned long) -1;
+
+	p1275_cmd_direct(args);
+
+	return (int) args[10];
+}
+
+/* Power management extensions. */
+void prom_sleepself(void)
+{
+	unsigned long args[3];
+
+	args[0] = (unsigned long) "SUNW,sleep-self";
+	args[1] = 0;
+	args[2] = 0;
+	p1275_cmd_direct(args);
+}
+
+int prom_sleepsystem(void)
+{
+	unsigned long args[4];
+
+	args[0] = (unsigned long) "SUNW,sleep-system";
+	args[1] = 0;
+	args[2] = 1;
+	args[3] = (unsigned long) -1;
+	p1275_cmd_direct(args);
+
+	return (int) args[3];
+}
+
+int prom_wakeupsystem(void)
+{
+	unsigned long args[4];
+
+	args[0] = (unsigned long) "SUNW,wakeup-system";
+	args[1] = 0;
+	args[2] = 1;
+	args[3] = (unsigned long) -1;
+	p1275_cmd_direct(args);
+
+	return (int) args[3];
+}
+
+#ifdef CONFIG_SMP
+void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
+{
+	unsigned long args[6];
+
+	args[0] = (unsigned long) "SUNW,start-cpu";
+	args[1] = 3;
+	args[2] = 0;
+	args[3] = (unsigned int) cpunode;
+	args[4] = pc;
+	args[5] = arg;
+	p1275_cmd_direct(args);
+}
+
+void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
+{
+	unsigned long args[6];
+
+	args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
+	args[1] = 3;
+	args[2] = 0;
+	args[3] = (unsigned int) cpuid;
+	args[4] = pc;
+	args[5] = arg;
+	p1275_cmd_direct(args);
+}
+
+void prom_stopcpu_cpuid(int cpuid)
+{
+	unsigned long args[4];
+
+	args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
+	args[1] = 1;
+	args[2] = 0;
+	args[3] = (unsigned int) cpuid;
+	p1275_cmd_direct(args);
+}
+
+void prom_stopself(void)
+{
+	unsigned long args[3];
+
+	args[0] = (unsigned long) "SUNW,stop-self";
+	args[1] = 0;
+	args[2] = 0;
+	p1275_cmd_direct(args);
+}
+
+void prom_idleself(void)
+{
+	unsigned long args[3];
+
+	args[0] = (unsigned long) "SUNW,idle-self";
+	args[1] = 0;
+	args[2] = 0;
+	p1275_cmd_direct(args);
+}
+
+void prom_resumecpu(int cpunode)
+{
+	unsigned long args[4];
+
+	args[0] = (unsigned long) "SUNW,resume-cpu";
+	args[1] = 1;
+	args[2] = 0;
+	args[3] = (unsigned int) cpunode;
+	p1275_cmd_direct(args);
+}
+#endif