--- zzzz-none-000/linux-3.10.107/arch/mips/mti-malta/malta-memory.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/mti-malta/malta-memory.c	2021-02-04 17:41:59.000000000 +0000
@@ -16,112 +16,25 @@
 #include <linux/string.h>
 
 #include <asm/bootinfo.h>
+#include <asm/cdmm.h>
+#include <asm/maar.h>
 #include <asm/sections.h>
 #include <asm/fw/fw.h>
 
-static fw_memblock_t mdesc[FW_MAX_MEMBLOCKS];
-
 /* determined physical memory size, not overridden by command line args	 */
 unsigned long physical_memsize = 0L;
 
-fw_memblock_t * __init fw_getmdesc(void)
-{
-	char *memsize_str, *ptr;
-	unsigned int memsize;
-	static char cmdline[COMMAND_LINE_SIZE] __initdata;
-	long val;
-	int tmp;
-
-	/* otherwise look in the environment */
-	memsize_str = fw_getenv("memsize");
-	if (!memsize_str) {
-		pr_warn("memsize not set in YAMON, set to default (32Mb)\n");
-		physical_memsize = 0x02000000;
-	} else {
-		tmp = kstrtol(memsize_str, 0, &val);
-		physical_memsize = (unsigned long)val;
-	}
-
-#ifdef CONFIG_CPU_BIG_ENDIAN
-	/* SOC-it swaps, or perhaps doesn't swap, when DMA'ing the last
-	   word of physical memory */
-	physical_memsize -= PAGE_SIZE;
-#endif
-
-	/* Check the command line for a memsize directive that overrides
-	   the physical/default amount */
-	strcpy(cmdline, arcs_cmdline);
-	ptr = strstr(cmdline, "memsize=");
-	if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' '))
-		ptr = strstr(ptr, " memsize=");
-
-	if (ptr)
-		memsize = memparse(ptr + 8, &ptr);
-	else
-		memsize = physical_memsize;
-
-	memset(mdesc, 0, sizeof(mdesc));
-
-	mdesc[0].type = fw_dontuse;
-	mdesc[0].base = 0x00000000;
-	mdesc[0].size = 0x00001000;
-
-	mdesc[1].type = fw_code;
-	mdesc[1].base = 0x00001000;
-	mdesc[1].size = 0x000ef000;
-
-	/*
-	 * The area 0x000f0000-0x000fffff is allocated for BIOS memory by the
-	 * south bridge and PCI access always forwarded to the ISA Bus and
-	 * BIOSCS# is always generated.
-	 * This mean that this area can't be used as DMA memory for PCI
-	 * devices.
-	 */
-	mdesc[2].type = fw_dontuse;
-	mdesc[2].base = 0x000f0000;
-	mdesc[2].size = 0x00010000;
-
-	mdesc[3].type = fw_dontuse;
-	mdesc[3].base = 0x00100000;
-	mdesc[3].size = CPHYSADDR(PFN_ALIGN((unsigned long)&_end)) -
-		mdesc[3].base;
-
-	mdesc[4].type = fw_free;
-	mdesc[4].base = CPHYSADDR(PFN_ALIGN(&_end));
-	mdesc[4].size = memsize - mdesc[4].base;
-
-	return &mdesc[0];
-}
-
-static int __init fw_memtype_classify(unsigned int type)
+static void free_init_pages_eva_malta(void *begin, void *end)
 {
-	switch (type) {
-	case fw_free:
-		return BOOT_MEM_RAM;
-	case fw_code:
-		return BOOT_MEM_ROM_DATA;
-	default:
-		return BOOT_MEM_RESERVED;
-	}
+	free_init_pages("unused kernel", __pa_symbol((unsigned long *)begin),
+			__pa_symbol((unsigned long *)end));
 }
 
 void __init fw_meminit(void)
 {
-	fw_memblock_t *p;
+	bool eva = config_enabled(CONFIG_EVA);
 
-	p = fw_getmdesc();
-
-	while (p->size) {
-		long type;
-		unsigned long base, size;
-
-		type = fw_memtype_classify(p->type);
-		base = p->base;
-		size = p->size;
-
-		add_memory_region(base, size, type);
-		p++;
-	}
+	free_init_pages_eva = eva ? free_init_pages_eva_malta : NULL;
 }
 
 void __init prom_free_prom_memory(void)
@@ -138,3 +51,9 @@
 				addr, addr + boot_mem_map.map[i].size);
 	}
 }
+
+phys_addr_t mips_cdmm_phys_base(void)
+{
+	/* This address is "typically unused" */
+	return 0x1fc10000;
+}