From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/9] ARM: pxa: enable sparsemem in saarb
Date: Fri, 1 Apr 2011 19:31:09 +0100 [thread overview]
Message-ID: <20110401183109.GA8482@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1301625568-16583-2-git-send-email-haojian.zhuang@marvell.com>
On Fri, Apr 01, 2011 at 10:39:21AM +0800, Haojian Zhuang wrote:
> Make sparsemem to support 512MB low memory with two banks in SAARB.
>
> Change-Id: I1688dde366b5f3b13b48b7167bf6b88afc4f9a92
> Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
> ---
> arch/arm/mach-pxa/Kconfig | 1 +
> arch/arm/mach-pxa/include/mach/memory.h | 36 ++++++++++++++++++++++++++++++-
> 2 files changed, 36 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
> index 2fc9f94..e8615ee 100644
> --- a/arch/arm/mach-pxa/Kconfig
> +++ b/arch/arm/mach-pxa/Kconfig
> @@ -53,6 +53,7 @@ config MACH_SAAR
> config MACH_SAARB
> bool "PXA955 Handheld Platform (aka SAARB)"
> select CPU_PXA955
> + select ARCH_SPARSEMEM_ENABLE
>
> comment "Third Party Dev Platforms (sorted by vendor name)"
>
> diff --git a/arch/arm/mach-pxa/include/mach/memory.h b/arch/arm/mach-pxa/include/mach/memory.h
> index 92361a6..9a3f265 100644
> --- a/arch/arm/mach-pxa/include/mach/memory.h
> +++ b/arch/arm/mach-pxa/include/mach/memory.h
> @@ -3,6 +3,7 @@
> *
> * Author: Nicolas Pitre
> * Copyright: (C) 2001 MontaVista Software Inc.
> + * Copyright: (C) 2010 Marvell Semiconductor Inc.
> *
> * This program is free software; you can redistribute it and/or modify
> * it under the terms of the GNU General Public License version 2 as
> @@ -27,4 +28,37 @@ void cmx2xx_pci_adjust_zones(unsigned long *size, unsigned long *holes);
> #define MAX_DMA_ADDRESS (PAGE_OFFSET + SZ_64M)
> #endif
>
> -#endif
> +
> +#ifdef CONFIG_SPARSEMEM
> +
> +#if defined(CONFIG_MACH_SAARB) || defined(CONFIG_MACH_SAARB_MG1)
> +/*
> + * There're two DRAM banks in PXA955 Saarb board.
> + *
> + * The macros below define sections with 256MB size and a non-linear virtual to
> + * physical mapping:
> + *
> + * node 0: 0x80000000-0x8fffffff -> 0xc0000000-0xcfffffff
> + * node 1: 0xc0000000-0xcfffffff -> 0xd0000000-0xdfffffff
> + *
> + * Since DRAM can be wrapped, 0xa0000000 equals to 0x80000000.
> + */
> +#define MAX_PHYSMEM_BITS 32
> +#define SECTION_SIZE_BITS 28
> +
> +/* bank page offsets */
> +#define BANK_PAGE_OFFSET (PAGE_OFFSET + 0x10000000)
> +
> +#define __phys_to_virt(phys) \
> + ((phys) >= 0xc0000000 ? (phys) - 0xc0000000 + BANK_PAGE_OFFSET :\
> + (phys) >= 0xa0000000 ? (phys) - 0xa0000000 + PAGE_OFFSET : \
> + (phys) - 0x80000000 + PAGE_OFFSET) \
> +
> +#define __virt_to_phys(virt) \
> + ((virt) >= BANK_PAGE_OFFSET ? (virt) - BANK_PAGE_OFFSET + 0xc0000000 :\
> + (virt) - PAGE_OFFSET + PLAT_PHYS_OFFSET)
This immediately means that you can't use the dynamic P2V stuff on PXA,
and so PXA can't be integrated with any other platform. Is there a reason
why you can't use highmem rather than squashing both 256MB banks into one
512MB region?
next prev parent reply other threads:[~2011-04-01 18:31 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <040101>
2011-04-01 2:39 ` [PATCH 1/9] ARM: pxa: add clk_set_rate() Haojian Zhuang
2011-04-01 2:39 ` [PATCH 2/9] ARM: pxa: enable sparsemem in saarb Haojian Zhuang
2011-04-01 2:39 ` [PATCH 3/9] ARM: mmp: remove redundant macro definition in mfp Haojian Zhuang
2011-04-01 2:39 ` [PATCH 4/9] ARM: pxa: use gpio reset Haojian Zhuang
2011-04-01 2:39 ` [PATCH 5/9] ARM: mmp: set correct uart according to board Haojian Zhuang
2011-04-01 2:39 ` [PATCH 6/9] ARM: mmp: update the reset implementation Haojian Zhuang
2011-04-01 2:39 ` [PATCH 7/9] ARM: pxa: align NR_BUILTIN_GPIO with GPIO interrupt number Haojian Zhuang
2011-04-01 2:39 ` [PATCH 8/9] ARM: mmp: align NR_BUILTIN_GPIO with gpio " Haojian Zhuang
2011-04-01 2:39 ` [PATCH 9/9] ARM: mmp: enable max7312 gpio expander in dkb Haojian Zhuang
2011-04-01 18:36 ` Russell King - ARM Linux
2011-07-05 7:14 ` Eric Miao
2011-04-01 18:35 ` [PATCH 4/9] ARM: pxa: use gpio reset Russell King - ARM Linux
2011-04-03 10:39 ` Igor Grinberg
2011-04-01 4:51 ` [PATCH 3/9] ARM: mmp: remove redundant macro definition in mfp Eric Miao
2011-04-01 5:09 ` Haojian Zhuang
2011-04-01 5:31 ` Eric Miao
2011-04-01 5:45 ` Haojian Zhuang
2011-04-01 6:47 ` Eric Miao
2011-04-01 3:45 ` [PATCH 2/9] ARM: pxa: enable sparsemem in saarb Eric Miao
2011-04-01 4:35 ` Haojian Zhuang
2011-04-01 5:10 ` Eric Miao
2011-04-01 18:33 ` Russell King - ARM Linux
2011-04-02 6:48 ` Eric Miao
2011-04-01 18:31 ` Russell King - ARM Linux [this message]
2011-04-01 3:36 ` [PATCH 1/9] ARM: pxa: add clk_set_rate() Eric Miao
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