RealView: Add default memory configuration

This patch adds a realview_fixup() function called during booting to set
up the memory banks. This way there is no need to pass a "mem=" argument
on the kernel command line.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

7 files changed, 44 insertions, 0 deletions

diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index a2083b60e3fb..c21b0fd39652 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -788,3 +788,24 @@ void __init realview_timer_init(unsigned int timer_irq)
         realview_clocksource_init();
         realview_clockevents_init(timer_irq);
 }
+
+/*
+ * Setup the memory banks.
+ */
+void realview_fixup(struct machine_desc *mdesc, struct tag *tags, char **from,
+                    struct meminfo *meminfo)
+{
+        /*
+         * Most RealView platforms have 512MB contiguous RAM at 0x70000000.
+         * Half of this is mirrored at 0.
+         */
+#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
+        meminfo->bank[0].start = 0x70000000;
+        meminfo->bank[0].size = SZ_512M;
+        meminfo->nr_banks = 1;
+#else
+        meminfo->bank[0].start = 0;
+        meminfo->bank[0].size = SZ_256M;
+        meminfo->nr_banks = 1;
+#endif
+}
diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
index 699671fa6e0b..781bca68a9fa 100644
--- a/arch/arm/mach-realview/core.h
+++ b/arch/arm/mach-realview/core.h
@@ -25,6 +25,7 @@
 #include <linux/amba/bus.h>
 #include <linux/io.h>
 
+#include <asm/setup.h>
 #include <asm/leds.h>
 
 #define AMBA_DEVICE(name,busid,base,plat)                       \
@@ -44,6 +45,8 @@ static struct amba_device name##_device = {			\
         /* .dma         = base##_DMA,*/                         \
 }
 
+struct machine_desc;
+
 extern struct platform_device realview_flash_device;
 extern struct platform_device realview_cf_device;
 extern struct platform_device realview_i2c_device;
@@ -61,5 +64,8 @@ extern void realview_timer_init(unsigned int timer_irq);
 extern int realview_flash_register(struct resource *res, u32 num);
 extern int realview_eth_register(const char *name, struct resource *res);
 extern int realview_usb_register(struct resource *res);
+extern void realview_fixup(struct machine_desc *mdesc, struct tag *tags,
+                           char **from, struct meminfo *meminfo);
 extern void (*realview_reset)(char);
+
 #endif
diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c
index 1d65e64ae571..917f8ca3abff 100644
--- a/arch/arm/mach-realview/realview_eb.c
+++ b/arch/arm/mach-realview/realview_eb.c
@@ -415,6 +415,7 @@ MACHINE_START(REALVIEW_EB, "ARM-RealView EB")
         .phys_io        = REALVIEW_EB_UART0_BASE,
         .io_pg_offst    = (IO_ADDRESS(REALVIEW_EB_UART0_BASE) >> 18) & 0xfffc,
         .boot_params    = PHYS_OFFSET + 0x00000100,
+        .fixup          = realview_fixup,
         .map_io         = realview_eb_map_io,
         .init_irq       = gic_init_irq,
         .timer          = &realview_eb_timer,
diff --git a/arch/arm/mach-realview/realview_pb1176.c b/arch/arm/mach-realview/realview_pb1176.c
index a6ba147692c1..7fb726d5f8b9 100644
--- a/arch/arm/mach-realview/realview_pb1176.c
+++ b/arch/arm/mach-realview/realview_pb1176.c
@@ -300,6 +300,18 @@ static void realview_pb1176_reset(char mode)
         __raw_writel(REALVIEW_PB1176_SYS_LOCKVAL_RSTCTL, hdr_ctrl);
 }
 
+static void realview_pb1176_fixup(struct machine_desc *mdesc,
+                                  struct tag *tags, char **from,
+                                  struct meminfo *meminfo)
+{
+        /*
+         * RealView PB1176 only has 128MB of RAM mapped at 0.
+         */
+        meminfo->bank[0].start = 0;
+        meminfo->bank[0].size = SZ_128M;
+        meminfo->nr_banks = 1;
+}
+
 static void __init realview_pb1176_init(void)
 {
         int i;
@@ -331,6 +343,7 @@ MACHINE_START(REALVIEW_PB1176, "ARM-RealView PB1176")
         .phys_io        = REALVIEW_PB1176_UART0_BASE,
         .io_pg_offst    = (IO_ADDRESS(REALVIEW_PB1176_UART0_BASE) >> 18) & 0xfffc,
         .boot_params    = PHYS_OFFSET + 0x00000100,
+        .fixup          = realview_pb1176_fixup,
         .map_io         = realview_pb1176_map_io,
         .init_irq       = gic_init_irq,
         .timer          = &realview_pb1176_timer,
diff --git a/arch/arm/mach-realview/realview_pb11mp.c b/arch/arm/mach-realview/realview_pb11mp.c
index 070d284ce96e..9bbbfc05f225 100644
--- a/arch/arm/mach-realview/realview_pb11mp.c
+++ b/arch/arm/mach-realview/realview_pb11mp.c
@@ -347,6 +347,7 @@ MACHINE_START(REALVIEW_PB11MP, "ARM-RealView PB11MPCore")
         .phys_io        = REALVIEW_PB11MP_UART0_BASE,
         .io_pg_offst    = (IO_ADDRESS(REALVIEW_PB11MP_UART0_BASE) >> 18) & 0xfffc,
         .boot_params    = PHYS_OFFSET + 0x00000100,
+        .fixup          = realview_fixup,
         .map_io         = realview_pb11mp_map_io,
         .init_irq       = gic_init_irq,
         .timer          = &realview_pb11mp_timer,
diff --git a/arch/arm/mach-realview/realview_pba8.c b/arch/arm/mach-realview/realview_pba8.c
index 941beb2b9709..fe861e96c566 100644
--- a/arch/arm/mach-realview/realview_pba8.c
+++ b/arch/arm/mach-realview/realview_pba8.c
@@ -298,6 +298,7 @@ MACHINE_START(REALVIEW_PBA8, "ARM-RealView PB-A8")
         .phys_io        = REALVIEW_PBA8_UART0_BASE,
         .io_pg_offst    = (IO_ADDRESS(REALVIEW_PBA8_UART0_BASE) >> 18) & 0xfffc,
         .boot_params    = PHYS_OFFSET + 0x00000100,
+        .fixup          = realview_fixup,
         .map_io         = realview_pba8_map_io,
         .init_irq       = gic_init_irq,
         .timer          = &realview_pba8_timer,
diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
index 7e4bc6cdca52..5d09d8b4a1cb 100644
--- a/arch/arm/mach-realview/realview_pbx.c
+++ b/arch/arm/mach-realview/realview_pbx.c
@@ -345,6 +345,7 @@ MACHINE_START(REALVIEW_PBX, "ARM-RealView PBX")
         .phys_io        = REALVIEW_PBX_UART0_BASE,
         .io_pg_offst    = (IO_ADDRESS(REALVIEW_PBX_UART0_BASE) >> 18) & 0xfffc,
         .boot_params    = PHYS_OFFSET + 0x00000100,
+        .fixup          = realview_fixup,
         .map_io         = realview_pbx_map_io,
         .init_irq       = gic_init_irq,
         .timer          = &realview_pbx_timer,