From: santosh.shilimkar@ti•com (Santosh Shilimkar)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 05/31] arm64: MMU initialisation
Date: Fri, 17 Aug 2012 15:36:11 +0530 [thread overview]
Message-ID: <502E1793.9080605@ti.com> (raw)
In-Reply-To: <1344966752-16102-6-git-send-email-catalin.marinas@arm.com>
On Tuesday 14 August 2012 11:22 PM, Catalin Marinas wrote:
> This patch contains the initialisation of the memory blocks, MMU
> attributes and the memory map. Only five memory types are defined:
> Device nGnRnE (equivalent to Strongly Ordered), Device nGnRE (classic
> Device memory), Device GRE, Normal Non-cacheable and Normal Cacheable.
> Cache policies are supported via the memory attributes register
> (MAIR_EL1) and only affect the Normal Cacheable mappings.
>
> This patch also adds the SPARSEMEM_VMEMMAP initialisation.
>
> Signed-off-by: Will Deacon<will.deacon@arm•com>
> Signed-off-by: Catalin Marinas<catalin.marinas@arm•com>
> ---
Whats the difference between Device nGnRE and Device GRE ?
Sorry, I haven't gone through the specs yet and hence the
question.
> arch/arm64/include/asm/memblock.h | 21 ++
> arch/arm64/mm/init.c | 416 +++++++++++++++++++++++++++++++++++++
> arch/arm64/mm/mmu.c | 395 +++++++++++++++++++++++++++++++++++
> 3 files changed, 832 insertions(+), 0 deletions(-)
> create mode 100644 arch/arm64/include/asm/memblock.h
> create mode 100644 arch/arm64/mm/init.c
> create mode 100644 arch/arm64/mm/mmu.c
>
> diff --git a/arch/arm64/include/asm/memblock.h b/arch/arm64/include/asm/memblock.h
> new file mode 100644
> index 0000000..6afeed2
> --- /dev/null
> +++ b/arch/arm64/include/asm/memblock.h
> @@ -0,0 +1,21 @@
> +/*
> + * Copyright (C) 2012 ARM Ltd.
> + *
> + * 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
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program. If not, see<http://www.gnu.org/licenses/>.
> + */
> +#ifndef __ASM_MEMBLOCK_H
> +#define __ASM_MEMBLOCK_H
> +
> +extern void arm64_memblock_init(void);
> +
> +#endif
> diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
> new file mode 100644
> index 0000000..c87583d
> --- /dev/null
> +++ b/arch/arm64/mm/init.c
> @@ -0,0 +1,416 @@
> +/*
> + * Based on arch/arm/mm/init.c
> + *
> + * Copyright (C) 1995-2005 Russell King
> + * Copyright (C) 2012 ARM Ltd.
> + *
> + * 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
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program. If not, see<http://www.gnu.org/licenses/>.
> + */
> +
> +#include<linux/kernel.h>
> +#include<linux/export.h>
> +#include<linux/errno.h>
> +#include<linux/swap.h>
> +#include<linux/init.h>
> +#include<linux/bootmem.h>
> +#include<linux/mman.h>
> +#include<linux/nodemask.h>
> +#include<linux/initrd.h>
> +#include<linux/gfp.h>
> +#include<linux/memblock.h>
> +#include<linux/sort.h>
> +#include<linux/of_fdt.h>
> +
> +#include<asm/prom.h>
> +#include<asm/sections.h>
> +#include<asm/setup.h>
> +#include<asm/sizes.h>
> +#include<asm/tlb.h>
> +
> +#include "mm.h"
> +
> +static unsigned long phys_initrd_start __initdata = 0;
> +static unsigned long phys_initrd_size __initdata = 0;
> +
> +phys_addr_t memstart_addr __read_mostly = 0;
> +
> +void __init early_init_dt_setup_initrd_arch(unsigned long start,
> + unsigned long end)
> +{
> + phys_initrd_start = start;
> + phys_initrd_size = end - start;
> +}
> +
> +static int __init early_initrd(char *p)
> +{
> + unsigned long start, size;
> + char *endp;
> +
> + start = memparse(p,&endp);
> + if (*endp == ',') {
> + size = memparse(endp + 1, NULL);
> +
> + phys_initrd_start = start;
> + phys_initrd_size = size;
> + }
> + return 0;
> +}
> +early_param("initrd", early_initrd);
> +
> +#define MAX_DMA32_PFN ((4UL * 1024 * 1024 * 1024)>> PAGE_SHIFT)
> +
> +static void __init zone_sizes_init(unsigned long min, unsigned long max)
> +{
> + unsigned long zone_size[MAX_NR_ZONES];
> + unsigned long max_dma32 = min;
> +
> + memset(zone_size, 0, sizeof(zone_size));
> +
> + zone_size[0] = max - min;
> +#ifdef CONFIG_ZONE_DMA32
> + /* 4GB maximum for 32-bit only capable devices */
> + max_dma32 = min(max, MAX_DMA32_PFN);
> + zone_size[ZONE_DMA32] = max_dma32 - min;
> +#endif
Do you see need of supporting DMA32 on arm64 SOCs ?
[..]
> diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
> new file mode 100644
> index 0000000..d2dd438
> --- /dev/null
> +++ b/arch/arm64/mm/mmu.c
> @@ -0,0 +1,395 @@
> +/*
> + * Based on arch/arm/mm/mmu.c
> + *
> + * Copyright (C) 1995-2005 Russell King
> + * Copyright (C) 2012 ARM Ltd.
> + *
> + * 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
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program. If not, see<http://www.gnu.org/licenses/>.
> + */
> +
> +#include<linux/export.h>
> +#include<linux/kernel.h>
> +#include<linux/errno.h>
> +#include<linux/init.h>
> +#include<linux/mman.h>
> +#include<linux/nodemask.h>
> +#include<linux/memblock.h>
> +#include<linux/fs.h>
> +
> +#include<asm/cputype.h>
> +#include<asm/sections.h>
> +#include<asm/setup.h>
> +#include<asm/sizes.h>
> +#include<asm/tlb.h>
> +#include<asm/mmu_context.h>
> +
> +#include "mm.h"
> +
> +/*
> + * Empty_zero_page is a special page that is used for zero-initialized data
> + * and COW.
> + */
> +struct page *empty_zero_page;
> +EXPORT_SYMBOL(empty_zero_page);
> +
> +pgprot_t pgprot_default;
> +EXPORT_SYMBOL(pgprot_default);
> +
> +static pmdval_t prot_sect_kernel;
> +
> +struct cachepolicy {
> + const char policy[16];
> + u64 mair;
> + u64 tcr;
> +};
> +
> +static struct cachepolicy cache_policies[] __initdata = {
> + {
> + .policy = "uncached",
> + .mair = 0x44, /* inner, outer non-cacheable */
> + .tcr = TCR_IRGN_NC | TCR_ORGN_NC,
> + }, {
> + .policy = "writethrough",
> + .mair = 0xaa, /* inner, outer write-through, read-allocate */
> + .tcr = TCR_IRGN_WT | TCR_ORGN_WT,
Is WT supported on arm64?
On the recent ARMv7 processors, I think WT wasn't supported.
Regards
Santosh
next prev parent reply other threads:[~2012-08-17 10:06 UTC|newest]
Thread overview: 170+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-14 17:52 [PATCH v2 00/31] AArch64 Linux kernel port Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 01/31] arm64: Assembly macros and definitions Catalin Marinas
2012-08-15 12:57 ` Arnd Bergmann
2012-08-14 17:52 ` [PATCH v2 02/31] arm64: Kernel booting and initialisation Catalin Marinas
2012-08-14 23:06 ` Olof Johansson
2012-08-15 17:37 ` Catalin Marinas
2012-08-15 19:03 ` Olof Johansson
2012-08-15 19:53 ` Catalin Marinas
2012-08-15 13:20 ` Arnd Bergmann
2012-08-15 17:06 ` Olof Johansson
2012-08-16 12:53 ` Catalin Marinas
2012-08-16 18:59 ` Nicolas Pitre
2012-08-17 11:20 ` Arnd Bergmann
2012-08-17 13:45 ` Catalin Marinas
2012-08-17 18:21 ` Nicolas Pitre
2012-08-17 8:56 ` Tony Lindgren
2012-08-17 9:41 ` Santosh Shilimkar
2012-08-17 10:05 ` Catalin Marinas
2012-08-17 10:10 ` Shilimkar, Santosh
2012-08-17 13:13 ` Tony Lindgren
2012-08-17 13:48 ` Catalin Marinas
2012-08-24 9:50 ` Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 03/31] arm64: Exception handling Catalin Marinas
2012-08-14 23:29 ` Olof Johansson
2012-08-14 23:47 ` Thomas Gleixner
2012-08-15 13:03 ` Arnd Bergmann
2012-08-16 10:05 ` Will Deacon
2012-08-16 11:54 ` Arnd Bergmann
2012-08-14 17:52 ` [PATCH v2 04/31] arm64: MMU definitions Catalin Marinas
2012-08-15 13:30 ` Arnd Bergmann
2012-08-15 13:39 ` Catalin Marinas
2012-08-15 16:34 ` Geert Uytterhoeven
2012-08-15 16:45 ` Catalin Marinas
2012-08-17 9:04 ` Tony Lindgren
2012-08-17 9:21 ` Catalin Marinas
2012-08-17 9:38 ` Tony Lindgren
2012-08-14 17:52 ` [PATCH v2 05/31] arm64: MMU initialisation Catalin Marinas
2012-08-15 13:45 ` Arnd Bergmann
2012-08-17 10:06 ` Santosh Shilimkar [this message]
2012-08-17 10:15 ` Catalin Marinas
2012-08-17 10:25 ` Shilimkar, Santosh
2012-08-14 17:52 ` [PATCH v2 06/31] arm64: MMU fault handling and page table management Catalin Marinas
2012-08-15 13:47 ` Arnd Bergmann
2012-08-17 16:07 ` Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 07/31] arm64: Process management Catalin Marinas
2012-08-14 23:50 ` Olof Johansson
2012-09-14 17:33 ` Catalin Marinas
2012-09-16 0:29 ` Olof Johansson
2012-08-15 13:53 ` Arnd Bergmann
2012-08-17 16:15 ` Catalin Marinas
2012-08-16 15:09 ` Tobias Klauser
2012-08-14 17:52 ` [PATCH v2 08/31] arm64: CPU support Catalin Marinas
2012-08-15 0:10 ` Olof Johansson
2012-08-20 15:57 ` Catalin Marinas
2012-08-20 20:47 ` Arnd Bergmann
2012-08-21 9:50 ` Catalin Marinas
2012-09-14 17:38 ` Catalin Marinas
2012-08-15 13:56 ` Arnd Bergmann
2012-08-20 16:00 ` Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 09/31] arm64: Cache maintenance routines Catalin Marinas
2012-08-17 9:57 ` Santosh Shilimkar
2012-08-17 10:07 ` Catalin Marinas
2012-08-17 10:12 ` Shilimkar, Santosh
2012-08-14 17:52 ` [PATCH v2 10/31] arm64: TLB maintenance functionality Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 11/31] arm64: IRQ handling Catalin Marinas
2012-08-14 23:22 ` Aaro Koskinen
2012-08-14 17:52 ` [PATCH v2 12/31] arm64: Atomic operations Catalin Marinas
2012-08-15 0:21 ` Olof Johansson
2012-08-14 17:52 ` [PATCH v2 13/31] arm64: Device specific operations Catalin Marinas
2012-08-15 0:33 ` Olof Johansson
2012-09-14 17:29 ` Catalin Marinas
2012-09-14 17:31 ` Arnd Bergmann
2012-09-14 17:39 ` Catalin Marinas
2012-09-16 0:28 ` Olof Johansson
2012-08-15 16:13 ` Arnd Bergmann
2012-08-17 9:19 ` Tony Lindgren
2012-08-14 17:52 ` [PATCH v2 14/31] arm64: DMA mapping API Catalin Marinas
2012-08-15 0:40 ` Olof Johansson
2012-08-21 13:05 ` Catalin Marinas
2012-08-15 16:16 ` Arnd Bergmann
2012-08-21 12:59 ` Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 15/31] arm64: SMP support Catalin Marinas
2012-08-15 0:49 ` Olof Johansson
2012-08-15 13:04 ` Arnd Bergmann
2012-08-17 9:21 ` Tony Lindgren
2012-08-17 9:32 ` Catalin Marinas
2012-08-17 9:39 ` Tony Lindgren
2012-08-14 17:52 ` [PATCH v2 16/31] arm64: ELF definitions Catalin Marinas
2012-08-15 14:15 ` Arnd Bergmann
2012-08-16 10:23 ` Will Deacon
2012-08-16 12:37 ` Arnd Bergmann
2012-08-21 16:06 ` Catalin Marinas
2012-08-21 18:17 ` Geert Uytterhoeven
2012-08-21 18:27 ` Catalin Marinas
2012-08-21 18:53 ` Mike Frysinger
2012-08-21 20:17 ` Arnd Bergmann
2012-09-05 19:56 ` Chris Metcalf
2012-08-14 17:52 ` [PATCH v2 17/31] arm64: System calls handling Catalin Marinas
2012-08-15 14:22 ` Arnd Bergmann
2012-08-21 17:51 ` Catalin Marinas
2012-08-21 20:14 ` Arnd Bergmann
2012-08-21 22:01 ` Catalin Marinas
2012-08-22 7:56 ` Arnd Bergmann
2012-08-22 10:29 ` Catalin Marinas
2012-08-22 12:27 ` Arnd Bergmann
2012-08-22 17:13 ` Catalin Marinas
2012-09-03 11:48 ` Catalin Marinas
2012-09-03 12:39 ` Arnd Bergmann
2012-08-14 17:52 ` [PATCH v2 18/31] arm64: VDSO support Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 19/31] arm64: Signal handling support Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 20/31] arm64: User access library functions Catalin Marinas
2012-08-15 14:49 ` [PATCH v2 20/31] arm64: User access library function Arnd Bergmann
2012-09-03 12:58 ` Catalin Marinas
2012-09-05 19:13 ` Russell King - ARM Linux
2012-09-05 21:01 ` Catalin Marinas
2012-09-05 21:05 ` Russell King - ARM Linux
2012-09-06 8:36 ` Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 21/31] arm64: 32-bit (compat) applications support Catalin Marinas
2012-08-15 14:34 ` Arnd Bergmann
2012-08-16 10:28 ` Will Deacon
2012-08-16 12:39 ` Arnd Bergmann
2012-08-23 6:46 ` PER_LINUX32, Was: " Arnd Bergmann
2012-08-23 10:42 ` Catalin Marinas
2012-08-28 18:28 ` Jiri Kosina
2012-08-24 10:43 ` Catalin Marinas
2012-08-26 4:49 ` Arnd Bergmann
2012-08-20 10:53 ` Pavel Machek
2012-08-20 20:34 ` Arnd Bergmann
2012-08-21 10:28 ` Pavel Machek
2012-08-14 17:52 ` [PATCH v2 22/31] arm64: Floating point and SIMD Catalin Marinas
2012-08-15 14:35 ` Arnd Bergmann
2012-08-14 17:52 ` [PATCH v2 23/31] arm64: Debugging support Catalin Marinas
2012-08-15 15:07 ` Arnd Bergmann
2012-08-16 10:47 ` Will Deacon
2012-08-16 12:49 ` Arnd Bergmann
2012-08-17 7:06 ` Arnd Bergmann
2012-08-20 9:07 ` Will Deacon
2012-08-20 9:27 ` Will Deacon
2012-08-20 20:10 ` Arnd Bergmann
2012-08-21 8:58 ` Will Deacon
2012-08-14 17:52 ` [PATCH v2 24/31] arm64: Add support for /proc/sys/debug/exception-trace Catalin Marinas
2012-08-15 15:08 ` Arnd Bergmann
2012-08-14 17:52 ` [PATCH v2 25/31] arm64: Performance counters support Catalin Marinas
2012-08-15 15:11 ` Arnd Bergmann
2012-08-16 10:51 ` Will Deacon
2012-08-14 17:52 ` [PATCH v2 26/31] arm64: Miscellaneous library functions Catalin Marinas
2012-08-15 15:21 ` Arnd Bergmann
2012-08-16 10:57 ` Will Deacon
2012-08-16 13:00 ` Arnd Bergmann
2012-08-16 14:11 ` Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 27/31] arm64: Loadable modules Catalin Marinas
2012-08-15 15:23 ` Arnd Bergmann
2012-08-15 15:35 ` Catalin Marinas
2012-08-15 16:16 ` Arnd Bergmann
2012-08-14 17:52 ` [PATCH v2 28/31] arm64: Generic timers support Catalin Marinas
2012-08-15 15:52 ` Arnd Bergmann
2012-08-16 12:40 ` Linus Walleij
2012-08-17 9:29 ` Tony Lindgren
2012-08-17 10:21 ` Santosh Shilimkar
2012-08-21 19:20 ` Christopher Covington
2012-08-14 17:52 ` [PATCH v2 29/31] arm64: Miscellaneous header files Catalin Marinas
2012-08-15 15:56 ` Arnd Bergmann
2012-08-14 17:52 ` [PATCH v2 30/31] arm64: Build infrastructure Catalin Marinas
2012-08-14 21:01 ` Sam Ravnborg
2012-08-15 16:07 ` Arnd Bergmann
2012-08-17 9:32 ` Tony Lindgren
2012-08-17 9:46 ` Catalin Marinas
2012-08-14 17:52 ` [PATCH v2 31/31] arm64: MAINTAINERS update Catalin Marinas
2012-08-15 15:57 ` Arnd Bergmann
2012-08-17 9:36 ` [PATCH v2 00/31] AArch64 Linux kernel port Tony Lindgren
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