e81a8c7dab
Move memory configuration to be performed via device tree for the Malta board. This moves more Malta specific code to malta-dtshim.c, leaving the rest of the mti-malta code a little more board-agnostic. This will be useful to share more code between boards, with the device tree providing the board specifics as intended. Since we can't rely upon Malta boards running a bootloader capable of handling devictrees & filling in the required information, a piece of shim code (malta_dt_shim) is added to consume the (e)memsize variables provided as part of the bootloader environment (or on the kernel command line) then generate the DT memory node using the provided values. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: Kumar Gala <galak@codeaurora.org> Cc: linux-kernel@vger.kernel.org Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Rob Herring <robh+dt@kernel.org> Cc: James Hogan <james.hogan@imgtec.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: Mark Rutland <mark.rutland@arm.com> Patchwork: https://patchwork.linux-mips.org/patch/11222/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* PROM library functions for acquiring/using memory descriptors given to
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* us from the YAMON.
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*
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* Copyright (C) 1999,2000,2012 MIPS Technologies, Inc.
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* All rights reserved.
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* Authors: Carsten Langgaard <carstenl@mips.com>
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* Steven J. Hill <sjhill@mips.com>
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*/
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <linux/string.h>
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#include <asm/bootinfo.h>
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#include <asm/cdmm.h>
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#include <asm/maar.h>
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#include <asm/sections.h>
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#include <asm/fw/fw.h>
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/* determined physical memory size, not overridden by command line args */
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unsigned long physical_memsize = 0L;
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static void free_init_pages_eva_malta(void *begin, void *end)
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{
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free_init_pages("unused kernel", __pa_symbol((unsigned long *)begin),
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__pa_symbol((unsigned long *)end));
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}
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void __init fw_meminit(void)
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{
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bool eva = config_enabled(CONFIG_EVA);
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free_init_pages_eva = eva ? free_init_pages_eva_malta : NULL;
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}
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void __init prom_free_prom_memory(void)
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{
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unsigned long addr;
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int i;
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for (i = 0; i < boot_mem_map.nr_map; i++) {
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if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
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continue;
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addr = boot_mem_map.map[i].addr;
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free_init_pages("YAMON memory",
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addr, addr + boot_mem_map.map[i].size);
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}
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}
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phys_addr_t mips_cdmm_phys_base(void)
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{
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/* This address is "typically unused" */
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return 0x1fc10000;
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}
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