--- zzzz-none-000/linux-3.10.107/arch/powerpc/mm/init_32.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/powerpc/mm/init_32.c	2021-02-04 17:41:59.000000000 +0000
@@ -26,7 +26,6 @@
 #include <linux/mm.h>
 #include <linux/stddef.h>
 #include <linux/init.h>
-#include <linux/bootmem.h>
 #include <linux/highmem.h>
 #include <linux/initrd.h>
 #include <linux/pagemap.h>
@@ -52,7 +51,7 @@
 #if defined(CONFIG_KERNEL_START_BOOL) || defined(CONFIG_LOWMEM_SIZE_BOOL)
 /* The amount of lowmem must be within 0xF0000000 - KERNELBASE. */
 #if (CONFIG_LOWMEM_SIZE > (0xF0000000 - PAGE_OFFSET))
-#error "You must adjust CONFIG_LOWMEM_SIZE or CONFIG_START_KERNEL"
+#error "You must adjust CONFIG_LOWMEM_SIZE or CONFIG_KERNEL_START"
 #endif
 #endif
 #define MAX_LOW_MEM	CONFIG_LOWMEM_SIZE
@@ -103,14 +102,14 @@
 /*
  * Check for command-line options that affect what MMU_init will do.
  */
-void MMU_setup(void)
+void __init MMU_setup(void)
 {
 	/* Check for nobats option (used in mapin_ram). */
-	if (strstr(cmd_line, "nobats")) {
+	if (strstr(boot_command_line, "nobats")) {
 		__map_without_bats = 1;
 	}
 
-	if (strstr(cmd_line, "noltlbs")) {
+	if (strstr(boot_command_line, "noltlbs")) {
 		__map_without_ltlbs = 1;
 	}
 #ifdef CONFIG_DEBUG_PAGEALLOC
@@ -195,15 +194,6 @@
 	memblock_set_current_limit(lowmem_end_addr);
 }
 
-/* This is only called until mem_init is done. */
-void __init *early_get_page(void)
-{
-	if (init_bootmem_done)
-		return alloc_bootmem_pages(PAGE_SIZE);
-	else
-		return __va(memblock_alloc(PAGE_SIZE, PAGE_SIZE));
-}
-
 #ifdef CONFIG_8xx /* No 8xx specific .c file to put that in ... */
 void setup_initial_memory_limit(phys_addr_t first_memblock_base,
 				phys_addr_t first_memblock_size)
@@ -213,7 +203,12 @@
 	 */
 	BUG_ON(first_memblock_base != 0);
 
+#ifdef CONFIG_PIN_TLB
+	/* 8xx can only access 24MB at the moment */
+	memblock_set_current_limit(min_t(u64, first_memblock_size, 0x01800000));
+#else
 	/* 8xx can only access 8MB at the moment */
 	memblock_set_current_limit(min_t(u64, first_memblock_size, 0x00800000));
+#endif
 }
 #endif /* CONFIG_8xx */