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RealView: Allow PHYS_OFFSET at 0x70000000 

RealView boards like PB11MPCore have 512MB of RAM available contiguously
at 0x70000000. Half of the memory is mirrored at 0x00000000 for
backwards compatibility. This patch adds the
CONFIG_REALVIEW_HIGH_PHYS_OFFSET option option to change the physical
base address so that the full amount of RAM is available to Linux. Note
that the EB board has 256MB of RAM also mirrored at 0x70000000, the only
board without this feature being PB1176.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Catalin Marinas 2008-12-01 14:54:55 +00:00
parent 877d1f3389
commit 70bb62f8ec
6 changed files with 24 additions and 4 deletions
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11
arch/arm/mach-realview/Kconfig
View File

@ -37,4 +37,15 @@ config MACH_REALVIEW_PB1176
help
Include support for the ARM(R) RealView ARM1176 Platform Baseboard.
config REALVIEW_HIGH_PHYS_OFFSET
bool "High physical base address for the RealView platform"
depends on !MACH_REALVIEW_PB1176
default y
help
RealView boards other than PB1176 have the RAM available at
0x70000000, 256MB of which being mirrored at 0x00000000. If
the board supports 512MB of RAM, this option allows the
memory to be accessed contiguously at the high physical
offset.
endmenu

7
arch/arm/mach-realview/Makefile.boot
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@ -1,4 +1,9 @@
ifeq ($(CONFIG_REALVIEW_HIGH_PHYS_OFFSET),y)
zreladdr-y := 0x70008000
params_phys-y := 0x70000100
initrd_phys-y := 0x70800000
else
zreladdr-y := 0x00008000
params_phys-y := 0x00000100
initrd_phys-y := 0x00800000
endif

4
arch/arm/mach-realview/include/mach/memory.h
View File

@ -23,7 +23,11 @@
/*
* Physical DRAM offset.
*/
#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
#define PHYS_OFFSET UL(0x70000000)
#else
#define PHYS_OFFSET UL(0x00000000)
#endif
/*
* Virtual view <-> DMA view memory address translations

2
arch/arm/mach-realview/realview_eb.c
View File

@ -392,7 +392,7 @@ MACHINE_START(REALVIEW_EB, "ARM-RealView EB")
/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
.phys_io = REALVIEW_EB_UART0_BASE,
.io_pg_offst = (IO_ADDRESS(REALVIEW_EB_UART0_BASE) >> 18) & 0xfffc,
.boot_params = 0x00000100,
.boot_params = PHYS_OFFSET + 0x00000100,
.map_io = realview_eb_map_io,
.init_irq = gic_init_irq,
.timer = &realview_eb_timer,

2
arch/arm/mach-realview/realview_pb1176.c
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@ -284,7 +284,7 @@ MACHINE_START(REALVIEW_PB1176, "ARM-RealView PB1176")
/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
.phys_io = REALVIEW_PB1176_UART0_BASE,
.io_pg_offst = (IO_ADDRESS(REALVIEW_PB1176_UART0_BASE) >> 18) & 0xfffc,
.boot_params = 0x00000100,
.boot_params = PHYS_OFFSET + 0x00000100,
.map_io = realview_pb1176_map_io,
.init_irq = gic_init_irq,
.timer = &realview_pb1176_timer,

2
arch/arm/mach-realview/realview_pb11mp.c
View File

@ -334,7 +334,7 @@ MACHINE_START(REALVIEW_PB11MP, "ARM-RealView PB11MPCore")
/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
.phys_io = REALVIEW_PB11MP_UART0_BASE,
.io_pg_offst = (IO_ADDRESS(REALVIEW_PB11MP_UART0_BASE) >> 18) & 0xfffc,
.boot_params = 0x00000100,
.boot_params = PHYS_OFFSET + 0x00000100,
.map_io = realview_pb11mp_map_io,
.init_irq = gic_init_irq,
.timer = &realview_pb11mp_timer,