--- zzzz-none-000/linux-3.10.107/arch/mips/ath79/prom.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/arch/mips/ath79/prom.c	2021-11-10 11:53:53.000000000 +0000
@@ -14,44 +14,141 @@
 #include <linux/io.h>
 #include <linux/string.h>
 
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/env.h>
+
+#include <linux/of_fdt.h>
+
 #include <asm/bootinfo.h>
 #include <asm/addrspace.h>
+#include <asm/traps.h>
+#include <asm/cacheflush.h>
+#include <asm/prom.h>
 
 #include "common.h"
 
-static inline int is_valid_ram_addr(void *addr)
-{
-	if (((u32) addr > KSEG0) &&
-	    ((u32) addr < (KSEG0 + ATH79_MEM_SIZE_MAX)))
-		return 1;
-
-	if (((u32) addr > KSEG1) &&
-	    ((u32) addr < (KSEG1 + ATH79_MEM_SIZE_MAX)))
-		return 1;
-
-	return 0;
+#ifdef CONFIG_EARLY_PRINTK
+extern void serial_print(char *fmt, ...) ;
+#else
+#define serial_print(fmt, ...)
+#endif
+
+static unsigned int fw3_save[8];
+
+/*--- #define DEBUG_ATH_PROM ---*/
+
+#if defined(DEBUG_ATH_PROM)
+#define ath_prom_print(arg...)      serial_print(arg)
+#else
+#define ath_prom_print(arg...)   
+#endif
+
+void prom_printf (const char *fmt, ...) {
+    va_list args;
+
+    va_start (args, fmt);
+    ath_prom_print (fmt, args);
+    va_end (args);
 }
 
-static __init void ath79_prom_init_cmdline(int argc, char **argv)
-{
+/*------------------------------------------------------------------------------------------*\
+\*------------------------------------------------------------------------------------------*/
+static __init void ath79_prom_init_cmdline(int argc, char **argv) {
+
 	int i;
 
+    serial_print("\n");     /*--- damit es schön aussieht ---*/
+    ath_prom_print("[%s]:\n", __func__);
+    ath_prom_print("[%s]: argv[0] = '%s'\n", __func__, argv[0]);
+    ath_prom_print("[%s]: argv[1] = '%s'\n", __func__, argv[1]);
+    ath_prom_print("[%s]: argv[2] = '%s'\n", __func__, argv[2]);
+
+#if 0
 	if (!is_valid_ram_addr(argv))
 		return;
+#endif
 
-	for (i = 0; i < argc; i++)
+	for (i = 0; i < argc; i++) {
+#if 0
 		if (is_valid_ram_addr(argv[i])) {
+#endif
 			strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
 			strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
+#if 0
 		}
+#endif
+    }
+
+    ath_prom_print("[%s]:commandline = '%s'\n", __FUNCTION__, arcs_cmdline);
+}
+
+/*------------------------------------------------------------------------------------------*\
+\*------------------------------------------------------------------------------------------*/
+static void __init mips_nmi_setup(void) {
+
+	void *base;
+	extern char except_vec_nmi;
+
+	base = cpu_has_veic ?
+		(void *)(CAC_BASE + 0xa80) :
+		(void *)(CAC_BASE + 0x380);
+	memcpy(base, &except_vec_nmi, 0x80);
+    printk(KERN_ERR "[%s] setup NMI vector to base 0x%p\n", __FUNCTION__, base);
+	flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
 }
 
-void __init prom_init(void)
+/*------------------------------------------------------------------------------------------*\
+\*------------------------------------------------------------------------------------------*/
+void __init device_tree_init(void)
 {
+	unsigned long base, size;
+
+	if (!initial_boot_params)
+		return;
+
+	base = virt_to_phys((void *)initial_boot_params);
+	size = be32_to_cpu(initial_boot_params->totalsize);
+
+	/* Before we do anything, lets reserve the dt blob */
+	reserve_bootmem(base, size, BOOTMEM_DEFAULT);
+
+	unflatten_device_tree();
+}
+
+/*------------------------------------------------------------------------------------------*\
+\*------------------------------------------------------------------------------------------*/
+void __init prom_init(void) {
+
+    ath_prom_print("[%s]:\n", __func__);
 	ath79_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
+    ath_prom_print("[%s]: call env_init\n", __func__);
+    env_init((int *)fw_arg2, ENV_LOCATION_FLASH);
+
+    memcpy(fw3_save, (const void *)fw_arg3, sizeof(fw3_save));
+    mips_machtype  = MACH_GROUP_ATHEROS;
+
+	board_nmi_handler_setup = mips_nmi_setup;
+
+    ath_prom_print("[%s]: done\n", __func__);
 }
 
 void __init prom_free_prom_memory(void)
 {
 	/* We do not have to prom memory to free */
 }
+
+static int __init prom_init_config(void)
+{
+	unsigned int *config = (unsigned int*)fw3_save;
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		unsigned int c = config[i] & ((128 << 10) - 1);
+
+		avm_prom_load_config_entry(c);
+	}
+
+	return 0;
+}
+late_initcall(prom_init_config);