Merge branch 'xtensa-sim-params' into xtensa-fixes

arch/xtensa/kernel/setup.c

@@ -317,8 +317,9 @@ static inline int mem_reserve(unsigned long start, unsigned long end)
 
 void __init setup_arch(char **cmdline_p)
 {
-	strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 	*cmdline_p = command_line;
+	platform_setup(cmdline_p);
+	strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
 
 	/* Reserve some memory regions */
 
@@ -382,8 +383,6 @@ void __init setup_arch(char **cmdline_p)
 
 	unflatten_and_copy_device_tree();
 
-	platform_setup(cmdline_p);
-
 #ifdef CONFIG_SMP
 	smp_init_cpus();
 #endif

arch/xtensa/platforms/iss/include/platform/simcall.h

@@ -6,6 +6,7 @@
  * for more details.
  *
  * Copyright (C) 2001 Tensilica Inc.
+ * Copyright (C) 2017 Cadence Design Systems Inc.
  */
 
 #ifndef _XTENSA_PLATFORM_ISS_SIMCALL_H
@@ -49,6 +50,10 @@
 #define SYS_bind        30
 #define SYS_ioctl	31
 
+#define SYS_iss_argc	1000	/* returns value of argc */
+#define SYS_iss_argv_size 1001	/* bytes needed for argv & arg strings */
+#define SYS_iss_set_argv 1002	/* saves argv & arg strings at given addr */
+
 /*
  * SYS_select_one specifiers
  */
@@ -118,5 +123,20 @@ static inline int simc_lseek(int fd, uint32_t off, int whence)
 	return __simc(SYS_lseek, fd, off, whence);
 }
 
+static inline int simc_argc(void)
+{
+	return __simc(SYS_iss_argc, 0, 0, 0);
+}
+
+static inline int simc_argv_size(void)
+{
+	return __simc(SYS_iss_argv_size, 0, 0, 0);
+}
+
+static inline void simc_argv(void *buf)
+{
+	__simc(SYS_iss_set_argv, (int)buf, 0, 0);
+}
+
 #endif /* _XTENSA_PLATFORM_ISS_SIMCALL_H */
 

arch/xtensa/platforms/iss/setup.c

@@ -8,6 +8,7 @@
  *          Joe Taylor <joe@tensilica.com>
  *
  * Copyright 2001 - 2005 Tensilica Inc.
+ * Copyright 2017 Cadence Design Systems Inc.
  *
  * This program is free software; you can redistribute  it and/or modify it
  * under  the terms of  the GNU General  Public License as published by the
@@ -15,6 +16,7 @@
  * option) any later version.
  *
  */
+#include <linux/bootmem.h>
 #include <linux/stddef.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
@@ -31,13 +33,13 @@
 
 #include <asm/platform.h>
 #include <asm/bootparam.h>
+#include <asm/setup.h>
 
 #include <platform/simcall.h>
 
 
 void __init platform_init(bp_tag_t* bootparam)
 {
-
 }
 
 void platform_halt(void)
@@ -59,26 +61,10 @@ void platform_restart(void)
 	/* control never gets here */
 }
 
-extern void iss_net_poll(void);
-
-const char twirl[]="|/-\\|/-\\";
-
 void platform_heartbeat(void)
 {
-#if 0
-	static int i = 0, j = 0;
-
-	if (--i < 0) {
-		i = 99;
-		printk("\r%c\r", twirl[j++]);
-		if (j == 8)
-			j = 0;
-	}
-#endif
 }
 
-
-
 static int
 iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
 {
@@ -87,12 +73,29 @@ iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
 }
 
 static struct notifier_block iss_panic_block = {
-	iss_panic_event,
-	NULL,
-	0
+	.notifier_call = iss_panic_event,
 };
 
 void __init platform_setup(char **p_cmdline)
 {
+	int argc = simc_argc();
+	int argv_size = simc_argv_size();
+
+	if (argc > 1) {
+		void **argv = alloc_bootmem(argv_size);
+		char *cmdline = alloc_bootmem(argv_size);
+		int i;
+
+		cmdline[0] = 0;
+		simc_argv((void *)argv);
+
+		for (i = 1; i < argc; ++i) {
+			if (i > 1)
+				strcat(cmdline, " ");
+			strcat(cmdline, argv[i]);
+		}
+		*p_cmdline = cmdline;
+	}
+
 	atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
 }