404a604338
Replace the ioremapped memory passed in from the drivers with a memblock_reserve and vmap. Adds a new function, persistent_ram_early_init, designed to be called from the machine init_early callback, that calls memblock_remove and saves the provided persistent ram area layout. Drivers only pass in their struct device * and ecc settings. Locating and mapping the memory is now handled entirely within persistent_ram. Also, convert ram_console to the new persistent_ram_init parameters that only take a struct device * and ecc settings. [jstultz: Fix pr_info casting issues on 64bit, folded two patches as the build breaks if they are apart. Also replaced phys_to_page() w/ pfn_to_page(addr>>PAGE_SHIFT), as phys_to_page is only on a few arches.] CC: Greg KH <gregkh@linuxfoundation.org> CC: Android Kernel Team <kernel-team@android.com> Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/*
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* Copyright (C) 2011 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef __LINUX_PERSISTENT_RAM_H__
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#define __LINUX_PERSISTENT_RAM_H__
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/types.h>
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struct persistent_ram_buffer;
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struct persistent_ram_descriptor {
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const char *name;
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phys_addr_t size;
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};
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struct persistent_ram {
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phys_addr_t start;
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phys_addr_t size;
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int num_descs;
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struct persistent_ram_descriptor *descs;
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struct list_head node;
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};
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struct persistent_ram_zone {
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struct list_head node;
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void *vaddr;
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struct persistent_ram_buffer *buffer;
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size_t buffer_size;
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/* ECC correction */
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bool ecc;
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char *par_buffer;
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char *par_header;
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struct rs_control *rs_decoder;
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int corrected_bytes;
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int bad_blocks;
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int ecc_block_size;
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int ecc_size;
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int ecc_symsize;
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int ecc_poly;
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char *old_log;
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size_t old_log_size;
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size_t old_log_footer_size;
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bool early;
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};
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int persistent_ram_early_init(struct persistent_ram *ram);
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struct persistent_ram_zone *persistent_ram_init_ringbuffer(struct device *dev,
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bool ecc);
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int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
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unsigned int count);
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size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
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void *persistent_ram_old(struct persistent_ram_zone *prz);
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void persistent_ram_free_old(struct persistent_ram_zone *prz);
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ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
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char *str, size_t len);
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#endif
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