From 2925aba4223f4532e85f0c6f64584b3e0b2849c3 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Sun, 18 Jun 2006 01:32:22 +0100
Subject: [MIPS] Cleanup memory managment initialization.

Historically plat_mem_setup did the entire platform initialization.  This
was rather impractical because it meant plat_mem_setup had to get away
without any kind of memory allocator.  To keep old code from breaking
plat_setup was just renamed to plat_setup and a second platform
initialization hook for anything else was introduced.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 arch/mips/au1000/common/setup.c             |  2 +-
 arch/mips/cobalt/setup.c                    |  2 +-
 arch/mips/ddb5xxx/ddb5074/setup.c           |  2 +-
 arch/mips/ddb5xxx/ddb5476/setup.c           |  2 +-
 arch/mips/ddb5xxx/ddb5477/setup.c           |  2 +-
 arch/mips/dec/setup.c                       |  2 +-
 arch/mips/galileo-boards/ev96100/setup.c    |  2 +-
 arch/mips/gt64120/ev64120/setup.c           |  2 +-
 arch/mips/gt64120/momenco_ocelot/setup.c    |  2 +-
 arch/mips/ite-boards/generic/it8172_setup.c |  2 +-
 arch/mips/jazz/setup.c                      |  2 +-
 arch/mips/jmr3927/rbhma3100/setup.c         |  2 +-
 arch/mips/kernel/setup.c                    | 56 ++++++++++++++++++++++-------
 arch/mips/lasat/setup.c                     |  2 +-
 arch/mips/mips-boards/atlas/atlas_setup.c   |  2 +-
 arch/mips/mips-boards/malta/malta_setup.c   |  2 +-
 arch/mips/mips-boards/sead/sead_setup.c     |  2 +-
 arch/mips/mips-boards/sim/sim_setup.c       |  2 +-
 arch/mips/momentum/jaguar_atx/setup.c       |  2 +-
 arch/mips/momentum/ocelot_3/setup.c         |  2 +-
 arch/mips/momentum/ocelot_c/setup.c         |  2 +-
 arch/mips/momentum/ocelot_g/setup.c         |  2 +-
 arch/mips/philips/pnx8550/common/setup.c    |  2 +-
 arch/mips/pmc-sierra/yosemite/setup.c       |  2 +-
 arch/mips/qemu/q-setup.c                    |  2 +-
 arch/mips/sgi-ip22/ip22-setup.c             |  2 +-
 arch/mips/sgi-ip27/ip27-init.c              |  2 +-
 arch/mips/sgi-ip32/ip32-setup.c             |  2 +-
 arch/mips/sibyte/swarm/setup.c              |  2 +-
 arch/mips/sni/setup.c                       |  2 +-
 arch/mips/tx4927/common/tx4927_setup.c      |  2 +-
 arch/mips/tx4938/common/setup.c             |  2 +-
 arch/mips/vr41xx/common/init.c              |  2 +-
 include/asm-mips/bootinfo.h                 |  6 ++++
 34 files changed, 81 insertions(+), 45 deletions(-)

diff --git a/arch/mips/au1000/common/setup.c b/arch/mips/au1000/common/setup.c
index eb6026ef1cbb..97165b6b3894 100644
--- a/arch/mips/au1000/common/setup.c
+++ b/arch/mips/au1000/common/setup.c
@@ -55,7 +55,7 @@ extern void au1xxx_time_init(void);
 extern void au1xxx_timer_setup(struct irqaction *irq);
 extern void set_cpuspec(void);
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	struct	cpu_spec *sp;
 	char *argptr;
diff --git a/arch/mips/cobalt/setup.c b/arch/mips/cobalt/setup.c
index 928431a9bcb0..ca719d6398bd 100644
--- a/arch/mips/cobalt/setup.c
+++ b/arch/mips/cobalt/setup.c
@@ -120,7 +120,7 @@ static struct pci_controller cobalt_pci_controller = {
 	.io_offset	= 0 - GT64111_IO_BASE
 };
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	static struct uart_port uart;
 	unsigned int devfn = PCI_DEVFN(COBALT_PCICONF_VIA, 0);
diff --git a/arch/mips/ddb5xxx/ddb5074/setup.c b/arch/mips/ddb5xxx/ddb5074/setup.c
index 91456b068c2e..4882ad1052e7 100644
--- a/arch/mips/ddb5xxx/ddb5074/setup.c
+++ b/arch/mips/ddb5xxx/ddb5074/setup.c
@@ -86,7 +86,7 @@ static void __init ddb_time_init(void)
 
 
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	set_io_port_base(NILE4_PCI_IO_BASE);
 	isa_slot_offset = NILE4_PCI_MEM_BASE;
diff --git a/arch/mips/ddb5xxx/ddb5476/setup.c b/arch/mips/ddb5xxx/ddb5476/setup.c
index fc8d8bb4849c..101021afb2e4 100644
--- a/arch/mips/ddb5xxx/ddb5476/setup.c
+++ b/arch/mips/ddb5xxx/ddb5476/setup.c
@@ -150,7 +150,7 @@ static struct {
 
 static void ddb5476_board_init(void);
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	set_io_port_base(KSEG1ADDR(DDB_PCI_IO_BASE));
 
diff --git a/arch/mips/ddb5xxx/ddb5477/setup.c b/arch/mips/ddb5xxx/ddb5477/setup.c
index 2f566034cc44..93167ecdb424 100644
--- a/arch/mips/ddb5xxx/ddb5477/setup.c
+++ b/arch/mips/ddb5xxx/ddb5477/setup.c
@@ -171,7 +171,7 @@ static void ddb5477_board_init(void);
 extern struct pci_controller ddb5477_ext_controller;
 extern struct pci_controller ddb5477_io_controller;
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	/* initialize board - we don't trust the loader */
         ddb5477_board_init();
diff --git a/arch/mips/dec/setup.c b/arch/mips/dec/setup.c
index ad5d436d80c1..9c707b9ceb65 100644
--- a/arch/mips/dec/setup.c
+++ b/arch/mips/dec/setup.c
@@ -147,7 +147,7 @@ static void __init dec_be_init(void)
 extern void dec_time_init(void);
 extern void dec_timer_setup(struct irqaction *);
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	board_be_init = dec_be_init;
 	board_time_init = dec_time_init;
diff --git a/arch/mips/galileo-boards/ev96100/setup.c b/arch/mips/galileo-boards/ev96100/setup.c
index 78dbb18edeb8..a04aea6123da 100644
--- a/arch/mips/galileo-boards/ev96100/setup.c
+++ b/arch/mips/galileo-boards/ev96100/setup.c
@@ -55,7 +55,7 @@ extern void mips_reboot_setup(void);
 
 unsigned char mac_0_1[12];
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	unsigned int config = read_c0_config();
 	unsigned int status = read_c0_status();
diff --git a/arch/mips/gt64120/ev64120/setup.c b/arch/mips/gt64120/ev64120/setup.c
index 6d859d1e7a2d..4236da31ecc6 100644
--- a/arch/mips/gt64120/ev64120/setup.c
+++ b/arch/mips/gt64120/ev64120/setup.c
@@ -71,7 +71,7 @@ unsigned long __init prom_free_prom_memory(void)
  */
 extern void gt64120_time_init(void);
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	_machine_restart = galileo_machine_restart;
 	_machine_halt = galileo_machine_halt;
diff --git a/arch/mips/gt64120/momenco_ocelot/setup.c b/arch/mips/gt64120/momenco_ocelot/setup.c
index 20b65d3d2151..1193a22c4693 100644
--- a/arch/mips/gt64120/momenco_ocelot/setup.c
+++ b/arch/mips/gt64120/momenco_ocelot/setup.c
@@ -152,7 +152,7 @@ void PMON_v2_setup()
 	gt64120_base = 0xe0000000;
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	void (*l3func)(unsigned long)=KSEG1ADDR(&setup_l3cache);
 	unsigned int tmpword;
diff --git a/arch/mips/ite-boards/generic/it8172_setup.c b/arch/mips/ite-boards/generic/it8172_setup.c
index 00844e621e5f..da6ae0991199 100644
--- a/arch/mips/ite-boards/generic/it8172_setup.c
+++ b/arch/mips/ite-boards/generic/it8172_setup.c
@@ -154,7 +154,7 @@ void __init it8172_init_ram_resource(unsigned long memsize)
 	it8172_resources.ram.end = memsize;
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	unsigned short dsr;
 	char *argptr;
diff --git a/arch/mips/jazz/setup.c b/arch/mips/jazz/setup.c
index 4036dc434551..c8d0df7d0c36 100644
--- a/arch/mips/jazz/setup.c
+++ b/arch/mips/jazz/setup.c
@@ -52,7 +52,7 @@ static struct resource jazz_io_resources[] = {
 	{ "dma2", 0xc0, 0xdf, IORESOURCE_BUSY },
 };
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	int i;
 
diff --git a/arch/mips/jmr3927/rbhma3100/setup.c b/arch/mips/jmr3927/rbhma3100/setup.c
index 1f136551f2ac..308e6cdcd245 100644
--- a/arch/mips/jmr3927/rbhma3100/setup.c
+++ b/arch/mips/jmr3927/rbhma3100/setup.c
@@ -238,7 +238,7 @@ static void jmr3927_board_init(void);
 extern struct resource pci_io_resource;
 extern struct resource pci_mem_resource;
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	char *argptr;
 
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 397a70e651b5..bfcec8d9bfe4 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -442,6 +442,48 @@ static inline void bootmem_init(void)
 #endif /* CONFIG_BLK_DEV_INITRD  */
 }
 
+/*
+ * arch_mem_init - initialize memory managment subsystem
+ *
+ *  o plat_mem_setup() detects the memory configuration and will record detected
+ *    memory areas using add_memory_region.
+ *  o parse_cmdline_early() parses the command line for mem= options which,
+ *    iff detected, will override the results of the automatic detection.
+ *
+ * At this stage the memory configuration of the system is known to the
+ * kernel but generic memory managment system is still entirely uninitialized.
+ *
+ *  o bootmem_init()
+ *  o sparse_init()
+ *  o paging_init()
+ *
+ * At this stage the bootmem allocator is ready to use.
+ *
+ * NOTE: historically plat_mem_setup did the entire platform initialization.
+ *       This was rather impractical because it meant plat_mem_setup had to
+ * get away without any kind of memory allocator.  To keep old code from
+ * breaking plat_setup was just renamed to plat_setup and a second platform
+ * initialization hook for anything else was introduced.
+ */
+
+extern void plat_mem_setup(void);
+
+static void __init arch_mem_init(char **cmdline_p)
+{
+	/* call board setup routine */
+	plat_mem_setup();
+
+	strlcpy(command_line, arcs_cmdline, sizeof(command_line));
+	strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
+
+	*cmdline_p = command_line;
+
+	parse_cmdline_early();
+	bootmem_init();
+	sparse_init();
+	paging_init();
+}
+
 static inline void resource_init(void)
 {
 	int i;
@@ -495,8 +537,6 @@ static inline void resource_init(void)
 #undef MAXMEM
 #undef MAXMEM_PFN
 
-extern void plat_setup(void);
-
 void __init setup_arch(char **cmdline_p)
 {
 	cpu_probe();
@@ -511,18 +551,8 @@ void __init setup_arch(char **cmdline_p)
 #endif
 #endif
 
-	/* call board setup routine */
-	plat_setup();
+	arch_mem_init(cmdline_p);
 
-	strlcpy(command_line, arcs_cmdline, sizeof(command_line));
-	strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
-
-	*cmdline_p = command_line;
-
-	parse_cmdline_early();
-	bootmem_init();
-	sparse_init();
-	paging_init();
 	resource_init();
 #ifdef CONFIG_SMP
 	plat_smp_setup();
diff --git a/arch/mips/lasat/setup.c b/arch/mips/lasat/setup.c
index bb70a8240e61..3f64277429e4 100644
--- a/arch/mips/lasat/setup.c
+++ b/arch/mips/lasat/setup.c
@@ -155,7 +155,7 @@ void __init serial_init(void)
 }
 #endif
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	int i;
 	lasat_misc  = &lasat_misc_info[mips_machtype];
diff --git a/arch/mips/mips-boards/atlas/atlas_setup.c b/arch/mips/mips-boards/atlas/atlas_setup.c
index c20d401ecf80..8cc9effcb832 100644
--- a/arch/mips/mips-boards/atlas/atlas_setup.c
+++ b/arch/mips/mips-boards/atlas/atlas_setup.c
@@ -50,7 +50,7 @@ const char *get_system_type(void)
 	return "MIPS Atlas";
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	mips_pcibios_init();
 
diff --git a/arch/mips/mips-boards/malta/malta_setup.c b/arch/mips/mips-boards/malta/malta_setup.c
index ae1de3dc71ed..0766e434b6bd 100644
--- a/arch/mips/mips-boards/malta/malta_setup.c
+++ b/arch/mips/mips-boards/malta/malta_setup.c
@@ -111,7 +111,7 @@ void __init fd_activate(void)
 }
 #endif
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	unsigned int i;
 
diff --git a/arch/mips/mips-boards/sead/sead_setup.c b/arch/mips/mips-boards/sead/sead_setup.c
index 4266ce445174..6430f11f3a95 100644
--- a/arch/mips/mips-boards/sead/sead_setup.c
+++ b/arch/mips/mips-boards/sead/sead_setup.c
@@ -45,7 +45,7 @@ const char *get_system_type(void)
 	return "MIPS SEAD";
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	ioport_resource.end = 0x7fffffff;
 
diff --git a/arch/mips/mips-boards/sim/sim_setup.c b/arch/mips/mips-boards/sim/sim_setup.c
index a2fd62997ca3..15a5dac4ae19 100644
--- a/arch/mips/mips-boards/sim/sim_setup.c
+++ b/arch/mips/mips-boards/sim/sim_setup.c
@@ -50,7 +50,7 @@ const char *get_system_type(void)
 	return "MIPSsim";
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	set_io_port_base(0xbfd00000);
 
diff --git a/arch/mips/momentum/jaguar_atx/setup.c b/arch/mips/momentum/jaguar_atx/setup.c
index 1379c76845dc..df1485501ce6 100644
--- a/arch/mips/momentum/jaguar_atx/setup.c
+++ b/arch/mips/momentum/jaguar_atx/setup.c
@@ -359,7 +359,7 @@ static __init int __init ja_pci_init(void)
 
 arch_initcall(ja_pci_init);
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	unsigned int tmpword;
 
diff --git a/arch/mips/momentum/ocelot_3/setup.c b/arch/mips/momentum/ocelot_3/setup.c
index c69195234309..8c53490ba6f1 100644
--- a/arch/mips/momentum/ocelot_3/setup.c
+++ b/arch/mips/momentum/ocelot_3/setup.c
@@ -313,7 +313,7 @@ static __init int __init ja_pci_init(void)
 
 arch_initcall(ja_pci_init);
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	unsigned int tmpword;
 
diff --git a/arch/mips/momentum/ocelot_c/setup.c b/arch/mips/momentum/ocelot_c/setup.c
index a3e6f5575592..257e1d1b72dd 100644
--- a/arch/mips/momentum/ocelot_c/setup.c
+++ b/arch/mips/momentum/ocelot_c/setup.c
@@ -231,7 +231,7 @@ void momenco_time_init(void)
 	rtc_mips_set_time = m48t37y_set_time;
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	unsigned int tmpword;
 
diff --git a/arch/mips/momentum/ocelot_g/setup.c b/arch/mips/momentum/ocelot_g/setup.c
index fed4e8eee116..72143ab1e900 100644
--- a/arch/mips/momentum/ocelot_g/setup.c
+++ b/arch/mips/momentum/ocelot_g/setup.c
@@ -162,7 +162,7 @@ static void __init setup_l3cache(unsigned long size)
 	printk("Done\n");
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	void (*l3func)(unsigned long) = (void *) KSEG1ADDR(setup_l3cache);
 	unsigned int tmpword;
diff --git a/arch/mips/philips/pnx8550/common/setup.c b/arch/mips/philips/pnx8550/common/setup.c
index 2b199f338080..0e791f4f6ea3 100644
--- a/arch/mips/philips/pnx8550/common/setup.c
+++ b/arch/mips/philips/pnx8550/common/setup.c
@@ -99,7 +99,7 @@ unsigned long get_system_mem_size(void)
 
 int pnx8550_console_port = -1;
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	int i;
 	char* argptr;
diff --git a/arch/mips/pmc-sierra/yosemite/setup.c b/arch/mips/pmc-sierra/yosemite/setup.c
index 3f724d661bdb..aa0d6ff3c6ec 100644
--- a/arch/mips/pmc-sierra/yosemite/setup.c
+++ b/arch/mips/pmc-sierra/yosemite/setup.c
@@ -218,7 +218,7 @@ static void __init py_late_time_init(void)
 	py_rtc_setup();
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	board_time_init = yosemite_time_init;
 	late_time_init = py_late_time_init;
diff --git a/arch/mips/qemu/q-setup.c b/arch/mips/qemu/q-setup.c
index f27155bc2d9a..e100d6072e31 100644
--- a/arch/mips/qemu/q-setup.c
+++ b/arch/mips/qemu/q-setup.c
@@ -20,7 +20,7 @@ static void __init qemu_timer_setup(struct irqaction *irq)
 	setup_irq(0, irq);
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	set_io_port_base(QEMU_PORT_BASE);
 	board_timer_setup = qemu_timer_setup;
diff --git a/arch/mips/sgi-ip22/ip22-setup.c b/arch/mips/sgi-ip22/ip22-setup.c
index 7018e1833e85..d7138906eb10 100644
--- a/arch/mips/sgi-ip22/ip22-setup.c
+++ b/arch/mips/sgi-ip22/ip22-setup.c
@@ -53,7 +53,7 @@ EXPORT_SYMBOL(ip22_do_break);
 extern void ip22_be_init(void) __init;
 extern void ip22_time_init(void) __init;
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	char *ctype;
 	char *cserial;
diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c
index 16c4b3410eaf..a6b490e99709 100644
--- a/arch/mips/sgi-ip27/ip27-init.c
+++ b/arch/mips/sgi-ip27/ip27-init.c
@@ -196,7 +196,7 @@ extern void ip27_setup_console(void);
 extern void ip27_time_init(void);
 extern void ip27_reboot_setup(void);
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	hubreg_t p, e, n_mode;
 	nasid_t nid;
diff --git a/arch/mips/sgi-ip32/ip32-setup.c b/arch/mips/sgi-ip32/ip32-setup.c
index a2dd8ae1ea8f..acbdad06fac1 100644
--- a/arch/mips/sgi-ip32/ip32-setup.c
+++ b/arch/mips/sgi-ip32/ip32-setup.c
@@ -87,7 +87,7 @@ void __init ip32_timer_setup(struct irqaction *irq)
 	setup_irq(IP32_R4K_TIMER_IRQ, irq);
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	board_be_init = ip32_be_init;
 
diff --git a/arch/mips/sibyte/swarm/setup.c b/arch/mips/sibyte/swarm/setup.c
index 4b5f74ff3edd..7f646bc0719c 100644
--- a/arch/mips/sibyte/swarm/setup.c
+++ b/arch/mips/sibyte/swarm/setup.c
@@ -103,7 +103,7 @@ int swarm_be_handler(struct pt_regs *regs, int is_fixup)
 	return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL);
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
 	bcm1480_setup();
diff --git a/arch/mips/sni/setup.c b/arch/mips/sni/setup.c
index c33cb9d1e18d..635b904cabd7 100644
--- a/arch/mips/sni/setup.c
+++ b/arch/mips/sni/setup.c
@@ -252,7 +252,7 @@ static inline void sni_pcimt_time_init(void)
 	rtc_mips_set_time = mc146818_set_rtc_mmss;
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	sni_pcimt_detect();
 	sni_pcimt_sc_init();
diff --git a/arch/mips/tx4927/common/tx4927_setup.c b/arch/mips/tx4927/common/tx4927_setup.c
index 77c3b66fb959..81a5acfe8c42 100644
--- a/arch/mips/tx4927/common/tx4927_setup.c
+++ b/arch/mips/tx4927/common/tx4927_setup.c
@@ -64,7 +64,7 @@ static void tx4927_write_buffer_flush(void)
 }
 
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	board_time_init = tx4927_time_init;
 	board_timer_setup = tx4927_timer_setup;
diff --git a/arch/mips/tx4938/common/setup.c b/arch/mips/tx4938/common/setup.c
index fc992953bf95..ef59a5cffc69 100644
--- a/arch/mips/tx4938/common/setup.c
+++ b/arch/mips/tx4938/common/setup.c
@@ -61,7 +61,7 @@ tx4938_write_buffer_flush(void)
 }
 
 void __init
-plat_setup(void)
+plat_mem_setup(void)
 {
 	board_time_init = tx4938_time_init;
 	board_timer_setup = tx4938_timer_setup;
diff --git a/arch/mips/vr41xx/common/init.c b/arch/mips/vr41xx/common/init.c
index 707bd0933eed..915bfa5c0719 100644
--- a/arch/mips/vr41xx/common/init.c
+++ b/arch/mips/vr41xx/common/init.c
@@ -58,7 +58,7 @@ static void __init timer_init(void)
 	board_timer_setup = setup_timer_irq;
 }
 
-void __init plat_setup(void)
+void __init plat_mem_setup(void)
 {
 	vr41xx_calculate_clock_frequency();
 
diff --git a/include/asm-mips/bootinfo.h b/include/asm-mips/bootinfo.h
index 14fc88f27226..edf2b9a71c82 100644
--- a/include/asm-mips/bootinfo.h
+++ b/include/asm-mips/bootinfo.h
@@ -258,4 +258,10 @@ extern char arcs_cmdline[CL_SIZE];
  * Registers a0, a1, a3 and a4 as passed to the kenrel entry by firmware
  */
 extern unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
+
+/*
+ * Platform memory detection hook called by setup_arch
+ */
+extern void plat_mem_setup(void);
+
 #endif /* _ASM_BOOTINFO_H */
-- 
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