mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 14:46:51 +07:00
29eb45a9ab
All arches do essentially the same thing now for early_init_dt_setup_initrd_arch, so it can now be removed. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Grant Likely <grant.likely@linaro.org>
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/*
|
|
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/memblock.h>
|
|
#include <linux/swap.h>
|
|
#include <linux/module.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/arcregs.h>
|
|
|
|
pgd_t swapper_pg_dir[PTRS_PER_PGD] __aligned(PAGE_SIZE);
|
|
char empty_zero_page[PAGE_SIZE] __aligned(PAGE_SIZE);
|
|
EXPORT_SYMBOL(empty_zero_page);
|
|
|
|
/* Default tot mem from .config */
|
|
static unsigned long arc_mem_sz = 0x20000000; /* some default */
|
|
|
|
/* User can over-ride above with "mem=nnn[KkMm]" in cmdline */
|
|
static int __init setup_mem_sz(char *str)
|
|
{
|
|
arc_mem_sz = memparse(str, NULL) & PAGE_MASK;
|
|
|
|
/* early console might not be setup yet - it will show up later */
|
|
pr_info("\"mem=%s\": mem sz set to %ldM\n", str, TO_MB(arc_mem_sz));
|
|
|
|
return 0;
|
|
}
|
|
early_param("mem", setup_mem_sz);
|
|
|
|
void __init early_init_dt_add_memory_arch(u64 base, u64 size)
|
|
{
|
|
arc_mem_sz = size & PAGE_MASK;
|
|
pr_info("Memory size set via devicetree %ldM\n", TO_MB(arc_mem_sz));
|
|
}
|
|
|
|
/*
|
|
* First memory setup routine called from setup_arch()
|
|
* 1. setup swapper's mm @init_mm
|
|
* 2. Count the pages we have and setup bootmem allocator
|
|
* 3. zone setup
|
|
*/
|
|
void __init setup_arch_memory(void)
|
|
{
|
|
unsigned long zones_size[MAX_NR_ZONES] = { 0, 0 };
|
|
unsigned long end_mem = CONFIG_LINUX_LINK_BASE + arc_mem_sz;
|
|
|
|
init_mm.start_code = (unsigned long)_text;
|
|
init_mm.end_code = (unsigned long)_etext;
|
|
init_mm.end_data = (unsigned long)_edata;
|
|
init_mm.brk = (unsigned long)_end;
|
|
|
|
/*
|
|
* We do it here, so that memory is correctly instantiated
|
|
* even if "mem=xxx" cmline over-ride is given and/or
|
|
* DT has memory node. Each causes an update to @arc_mem_sz
|
|
* and we finally add memory one here
|
|
*/
|
|
memblock_add(CONFIG_LINUX_LINK_BASE, arc_mem_sz);
|
|
|
|
/*------------- externs in mm need setting up ---------------*/
|
|
|
|
/* first page of system - kernel .vector starts here */
|
|
min_low_pfn = PFN_DOWN(CONFIG_LINUX_LINK_BASE);
|
|
|
|
/* Last usable page of low mem (no HIGHMEM yet for ARC port) */
|
|
max_low_pfn = max_pfn = PFN_DOWN(end_mem);
|
|
|
|
max_mapnr = max_low_pfn - min_low_pfn;
|
|
|
|
/*------------- reserve kernel image -----------------------*/
|
|
memblock_reserve(CONFIG_LINUX_LINK_BASE,
|
|
__pa(_end) - CONFIG_LINUX_LINK_BASE);
|
|
|
|
memblock_dump_all();
|
|
|
|
/*-------------- node setup --------------------------------*/
|
|
memset(zones_size, 0, sizeof(zones_size));
|
|
zones_size[ZONE_NORMAL] = max_low_pfn - min_low_pfn;
|
|
|
|
/*
|
|
* We can't use the helper free_area_init(zones[]) because it uses
|
|
* PAGE_OFFSET to compute the @min_low_pfn which would be wrong
|
|
* when our kernel doesn't start at PAGE_OFFSET, i.e.
|
|
* PAGE_OFFSET != CONFIG_LINUX_LINK_BASE
|
|
*/
|
|
free_area_init_node(0, /* node-id */
|
|
zones_size, /* num pages per zone */
|
|
min_low_pfn, /* first pfn of node */
|
|
NULL); /* NO holes */
|
|
}
|
|
|
|
/*
|
|
* mem_init - initializes memory
|
|
*
|
|
* Frees up bootmem
|
|
* Calculates and displays memory available/used
|
|
*/
|
|
void __init mem_init(void)
|
|
{
|
|
high_memory = (void *)(CONFIG_LINUX_LINK_BASE + arc_mem_sz);
|
|
free_all_bootmem();
|
|
mem_init_print_info(NULL);
|
|
}
|
|
|
|
/*
|
|
* free_initmem: Free all the __init memory.
|
|
*/
|
|
void __init_refok free_initmem(void)
|
|
{
|
|
free_initmem_default(-1);
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
void __init free_initrd_mem(unsigned long start, unsigned long end)
|
|
{
|
|
free_reserved_area((void *)start, (void *)end, -1, "initrd");
|
|
}
|
|
#endif
|