Commit 9ba067f9 authored by Max Filippov's avatar Max Filippov
Browse files

xtensa: split bootparam and kernel meminfo



Bootparam meminfo is a bootloader ABI, kernel meminfo is for the kernel
bookkeeping, keep them separate. Kernel doesn't care of memory region
types, so drop the type field and don't pass it to add_sysmem_bank.
Move kernel sysmem structures and prototypes to asm/sysmem.h and sysmem
variable and add_sysmem_bank to mm/init.c

Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
parent 25df8198
......@@ -37,23 +37,14 @@ typedef struct bp_tag {
unsigned long data[0]; /* data */
} bp_tag_t;
typedef struct meminfo {
struct bp_meminfo {
unsigned long type;
unsigned long start;
unsigned long end;
} meminfo_t;
#define SYSMEM_BANKS_MAX 5
};
#define MEMORY_TYPE_CONVENTIONAL 0x1000
#define MEMORY_TYPE_NONE 0x2000
typedef struct sysmem_info {
int nr_banks;
meminfo_t bank[SYSMEM_BANKS_MAX];
} sysmem_info_t;
extern sysmem_info_t sysmem;
#endif
#endif
/*
* sysmem-related prototypes.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2014 Cadence Design Systems Inc.
*/
#ifndef _XTENSA_SYSMEM_H
#define _XTENSA_SYSMEM_H
#define SYSMEM_BANKS_MAX 31
struct meminfo {
unsigned long start;
unsigned long end;
};
struct sysmem_info {
int nr_banks;
struct meminfo bank[SYSMEM_BANKS_MAX];
};
extern struct sysmem_info sysmem;
int add_sysmem_bank(unsigned long start, unsigned long end);
int mem_reserve(unsigned long, unsigned long, int);
void bootmem_init(void);
void zones_init(void);
#endif /* _XTENSA_SYSMEM_H */
......@@ -50,6 +50,7 @@
#include <asm/param.h>
#include <asm/traps.h>
#include <asm/smp.h>
#include <asm/sysmem.h>
#include <platform/hardware.h>
......@@ -88,12 +89,6 @@ static char __initdata command_line[COMMAND_LINE_SIZE];
static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
#endif
sysmem_info_t __initdata sysmem;
extern int mem_reserve(unsigned long, unsigned long, int);
extern void bootmem_init(void);
extern void zones_init(void);
/*
* Boot parameter parsing.
*
......@@ -113,31 +108,14 @@ typedef struct tagtable {
/* parse current tag */
static int __init add_sysmem_bank(unsigned long type, unsigned long start,
unsigned long end)
{
if (sysmem.nr_banks >= SYSMEM_BANKS_MAX) {
printk(KERN_WARNING
"Ignoring memory bank 0x%08lx size %ldKB\n",
start, end - start);
return -EINVAL;
}
sysmem.bank[sysmem.nr_banks].type = type;
sysmem.bank[sysmem.nr_banks].start = PAGE_ALIGN(start);
sysmem.bank[sysmem.nr_banks].end = end & PAGE_MASK;
sysmem.nr_banks++;
return 0;
}
static int __init parse_tag_mem(const bp_tag_t *tag)
{
meminfo_t *mi = (meminfo_t *)(tag->data);
struct bp_meminfo *mi = (struct bp_meminfo *)(tag->data);
if (mi->type != MEMORY_TYPE_CONVENTIONAL)
return -1;
return add_sysmem_bank(mi->type, mi->start, mi->end);
return add_sysmem_bank(mi->start, mi->end);
}
__tagtable(BP_TAG_MEMORY, parse_tag_mem);
......@@ -146,8 +124,8 @@ __tagtable(BP_TAG_MEMORY, parse_tag_mem);
static int __init parse_tag_initrd(const bp_tag_t* tag)
{
meminfo_t* mi;
mi = (meminfo_t*)(tag->data);
struct bp_meminfo *mi = (struct bp_meminfo *)(tag->data);
initrd_start = (unsigned long)__va(mi->start);
initrd_end = (unsigned long)__va(mi->end);
......@@ -255,7 +233,7 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)
return;
size &= PAGE_MASK;
add_sysmem_bank(MEMORY_TYPE_CONVENTIONAL, base, base + size);
add_sysmem_bank(base, base + size);
}
void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
......@@ -292,8 +270,6 @@ device_initcall(xtensa_device_probe);
void __init init_arch(bp_tag_t *bp_start)
{
sysmem.nr_banks = 0;
/* Parse boot parameters */
if (bp_start)
......@@ -304,10 +280,9 @@ void __init init_arch(bp_tag_t *bp_start)
#endif
if (sysmem.nr_banks == 0) {
sysmem.nr_banks = 1;
sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START;
sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START
+ PLATFORM_DEFAULT_MEM_SIZE;
add_sysmem_bank(PLATFORM_DEFAULT_MEM_START,
PLATFORM_DEFAULT_MEM_START +
PLATFORM_DEFAULT_MEM_SIZE);
}
#ifdef CONFIG_CMDLINE_BOOL
......
......@@ -27,6 +27,23 @@
#include <asm/bootparam.h>
#include <asm/page.h>
#include <asm/sections.h>
#include <asm/sysmem.h>
struct sysmem_info sysmem __initdata;
int __init add_sysmem_bank(unsigned long start, unsigned long end)
{
if (sysmem.nr_banks >= SYSMEM_BANKS_MAX) {
pr_warn("Ignoring memory bank 0x%08lx size %ldKB\n",
start, end - start);
return -EINVAL;
}
sysmem.bank[sysmem.nr_banks].start = PAGE_ALIGN(start);
sysmem.bank[sysmem.nr_banks].end = end & PAGE_MASK;
sysmem.nr_banks++;
return 0;
}
/*
* mem_reserve(start, end, must_exist)
......
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