sh: enable LMB region setup via machvec.

This plugs in a memory init callback in the machvec to permit boards to
wire up various bits of memory directly in to LMB. A generic machvec
implementation is provided that simply wraps around the normal
Kconfig-derived memory start/size.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/io_generic.h

@@ -38,5 +38,6 @@ void IO_CONCAT(__IO_PREFIX,iounmap)(void *addr);
 
 void __iomem *IO_CONCAT(__IO_PREFIX,ioport_map)(unsigned long addr, unsigned int size);
 void IO_CONCAT(__IO_PREFIX,ioport_unmap)(void __iomem *addr);
+void IO_CONCAT(__IO_PREFIX,mem_init)(void);
 
 #undef __IO_PREFIX

arch/sh/include/asm/machvec.h

@@ -49,6 +49,8 @@ struct sh_machine_vector {
 
 	int (*mv_clk_init)(void);
 	int (*mv_mode_pins)(void);
+
+	void (*mv_mem_init)(void);
 };
 
 extern struct sh_machine_vector sh_mv;

arch/sh/include/asm/mmzone.h

@@ -42,7 +42,6 @@ setup_bootmem_node(int nid, unsigned long start, unsigned long end)
 void __init plat_mem_setup(void);
 
 /* arch/sh/kernel/setup.c */
-void __init setup_bootmem_allocator(unsigned long start_pfn);
 void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
 			       unsigned long end_pfn);
 

arch/sh/kernel/machvec.c

@@ -131,6 +131,7 @@ void __init sh_mv_setup(void)
 	mv_set(ioport_unmap);
 	mv_set(irq_demux);
 	mv_set(mode_pins);
+	mv_set(mem_init);
 
 	if (!sh_mv.mv_nr_irqs)
 		sh_mv.mv_nr_irqs = NR_IRQS;

arch/sh/kernel/setup.c

@@ -4,7 +4,7 @@
  * This file handles the architecture-dependent parts of initialization
  *
  *  Copyright (C) 1999  Niibe Yutaka
- *  Copyright (C) 2002 - 2007 Paul Mundt
+ *  Copyright (C) 2002 - 2010 Paul Mundt
  */
 #include <linux/screen_info.h>
 #include <linux/ioport.h>
@@ -41,6 +41,7 @@
 #include <asm/clock.h>
 #include <asm/smp.h>
 #include <asm/mmu_context.h>
+#include <asm/mmzone.h>
 
 /*
  * Initialize loops_per_jiffy as 10000000 (1000MIPS).
@@ -247,7 +248,7 @@ void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
 	add_active_range(nid, start_pfn, end_pfn);
 }
 
-void __init setup_bootmem_allocator(unsigned long free_pfn)
+void __init do_init_bootmem(void)
 {
 	unsigned long bootmap_size;
 	unsigned long bootmap_pages, bootmem_paddr;
@@ -298,12 +299,9 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
 	sparse_memory_present_with_active_regions(0);
 }
 
-#ifndef CONFIG_NEED_MULTIPLE_NODES
 static void __init setup_memory(void)
 {
 	unsigned long start_pfn;
-	u64 base = min_low_pfn << PAGE_SHIFT;
-	u64 size = (max_low_pfn << PAGE_SHIFT) - base;
 
 	/*
 	 * Partially used pages are not usable - thus
@@ -311,8 +309,6 @@ static void __init setup_memory(void)
 	 */
 	start_pfn = PFN_UP(__pa(_end));
 
-	lmb_add(base, size);
-
 	/*
 	 * Reserve the kernel text and
 	 * Reserve the bootmem bitmap. We do this in two steps (first step
@@ -333,11 +329,9 @@ static void __init setup_memory(void)
 	lmb_analyze();
 	lmb_dump_all();
 
-	setup_bootmem_allocator(start_pfn);
+	do_init_bootmem();
+	plat_mem_setup();
 }
-#else
-extern void __init setup_memory(void);
-#endif
 
 /*
  * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
@@ -358,7 +352,11 @@ static int __init parse_elfcorehdr(char *arg)
 early_param("elfcorehdr", parse_elfcorehdr);
 #endif
 
-void __init __attribute__ ((weak)) plat_early_device_setup(void)
+void __init __weak plat_early_device_setup(void)
+{
+}
+
+void __init __weak plat_mem_setup(void)
 {
 }
 
@@ -426,7 +424,10 @@ void __init setup_arch(char **cmdline_p)
 	/* Let earlyprintk output early console messages */
 	early_platform_driver_probe("earlyprintk", 1, 1);
 
+	lmb_init();
+
 	sh_mv_setup();
+	sh_mv.mv_mem_init();
 
 	/*
 	 * Find the highest page frame number we have available
@@ -442,7 +443,6 @@ void __init setup_arch(char **cmdline_p)
 	nodes_clear(node_online_map);
 
 	pmb_init();
-	lmb_init();
 	setup_memory();
 	sparse_init();
 

arch/sh/mm/init.c

@@ -2,7 +2,7 @@
  * linux/arch/sh/mm/init.c
  *
  *  Copyright (C) 1999  Niibe Yutaka
- *  Copyright (C) 2002 - 2007  Paul Mundt
+ *  Copyright (C) 2002 - 2010  Paul Mundt
  *
  *  Based on linux/arch/i386/mm/init.c:
  *   Copyright (C) 1995  Linus Torvalds
@@ -16,6 +16,7 @@
 #include <linux/pagemap.h>
 #include <linux/percpu.h>
 #include <linux/io.h>
+#include <linux/lmb.h>
 #include <linux/dma-mapping.h>
 #include <asm/mmu_context.h>
 #include <asm/tlb.h>
@@ -27,6 +28,11 @@
 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
 pgd_t swapper_pg_dir[PTRS_PER_PGD];
 
+void __init generic_mem_init(void)
+{
+	lmb_add(__MEMORY_START, __MEMORY_SIZE);
+}
+
 #ifdef CONFIG_MMU
 static pte_t *__get_pte_phys(unsigned long addr)
 {