43064c0c8e
This patch addresses a couple of related problems: 1) The kernel may reside in physical memory outside of the ranges set by plat_mem_setup(). If this is the case, init mem cannot be reused as it resides outside of the range of pages that the kernel memory allocators control. 2) initrd images might be loaded in physical memory outside of the ranges set by plat_mem_setup(). The memory likewise cannot be reused. The patch doesn't handle this specific case, but the infrastructure is useful for future patches that do. The crux of the problem is that there are memory regions that need be memory_present(), but that cannot be free_bootmem() at the time of arch_mem_init(). We create a new type of memory (BOOT_MEM_INIT_RAM) for use with add_memory_region(). Then arch_mem_init() adds the init mem with this type if the init mem is not already covered by existing ranges. When memory is being freed into the bootmem allocator, we skip the BOOT_MEM_INIT_RAM ranges so they are not clobbered, but we do signal them as memory_present(). This way when they are later freed, the necessary memory manager structures have initialized and the Sparse allocater is prevented from crashing. The Octeon specific code that handled this case is removed, because the new general purpose code handles the case. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1988/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
142 lines
3.9 KiB
C
142 lines
3.9 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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* Copyright (C) 1995, 1996, 2003 by Ralf Baechle
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* Copyright (C) 1995, 1996 Andreas Busse
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* Copyright (C) 1995, 1996 Stoned Elipot
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* Copyright (C) 1995, 1996 Paul M. Antoine.
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* Copyright (C) 2009 Zhang Le
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*/
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#ifndef _ASM_BOOTINFO_H
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#define _ASM_BOOTINFO_H
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#include <linux/types.h>
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#include <asm/setup.h>
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/*
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* The MACH_ IDs are sort of equivalent to PCI product IDs. As such the
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* numbers do not necessarily reflect technical relations or similarities
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* between systems.
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*/
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/*
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* Valid machtype values for group unknown
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*/
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#define MACH_UNKNOWN 0 /* whatever... */
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/*
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* Valid machtype for group DEC
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*/
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#define MACH_DSUNKNOWN 0
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#define MACH_DS23100 1 /* DECstation 2100 or 3100 */
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#define MACH_DS5100 2 /* DECsystem 5100 */
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#define MACH_DS5000_200 3 /* DECstation 5000/200 */
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#define MACH_DS5000_1XX 4 /* DECstation 5000/120, 125, 133, 150 */
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#define MACH_DS5000_XX 5 /* DECstation 5000/20, 25, 33, 50 */
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#define MACH_DS5000_2X0 6 /* DECstation 5000/240, 260 */
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#define MACH_DS5400 7 /* DECsystem 5400 */
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#define MACH_DS5500 8 /* DECsystem 5500 */
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#define MACH_DS5800 9 /* DECsystem 5800 */
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#define MACH_DS5900 10 /* DECsystem 5900 */
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/*
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* Valid machtype for group PMC-MSP
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*/
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#define MACH_MSP4200_EVAL 0 /* PMC-Sierra MSP4200 Evaluation */
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#define MACH_MSP4200_GW 1 /* PMC-Sierra MSP4200 Gateway demo */
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#define MACH_MSP4200_FPGA 2 /* PMC-Sierra MSP4200 Emulation */
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#define MACH_MSP7120_EVAL 3 /* PMC-Sierra MSP7120 Evaluation */
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#define MACH_MSP7120_GW 4 /* PMC-Sierra MSP7120 Residential GW */
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#define MACH_MSP7120_FPGA 5 /* PMC-Sierra MSP7120 Emulation */
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#define MACH_MSP_OTHER 255 /* PMC-Sierra unknown board type */
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/*
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* Valid machtype for group Mikrotik
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*/
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#define MACH_MIKROTIK_RB532 0 /* Mikrotik RouterBoard 532 */
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#define MACH_MIKROTIK_RB532A 1 /* Mikrotik RouterBoard 532A */
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/*
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* Valid machtype for Loongson family
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*/
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#define MACH_LOONGSON_UNKNOWN 0
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#define MACH_LEMOTE_FL2E 1
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#define MACH_LEMOTE_FL2F 2
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#define MACH_LEMOTE_ML2F7 3
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#define MACH_LEMOTE_YL2F89 4
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#define MACH_DEXXON_GDIUM2F10 5
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#define MACH_LEMOTE_NAS 6
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#define MACH_LEMOTE_LL2F 7
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#define MACH_LOONGSON_END 8
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/*
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* Valid machtype for group INGENIC
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*/
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#define MACH_INGENIC_JZ4730 0 /* JZ4730 SOC */
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#define MACH_INGENIC_JZ4740 1 /* JZ4740 SOC */
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extern char *system_type;
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const char *get_system_type(void);
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extern unsigned long mips_machtype;
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#define BOOT_MEM_MAP_MAX 32
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#define BOOT_MEM_RAM 1
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#define BOOT_MEM_ROM_DATA 2
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#define BOOT_MEM_RESERVED 3
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#define BOOT_MEM_INIT_RAM 4
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/*
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* A memory map that's built upon what was determined
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* or specified on the command line.
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*/
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struct boot_mem_map {
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int nr_map;
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struct boot_mem_map_entry {
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phys_t addr; /* start of memory segment */
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phys_t size; /* size of memory segment */
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long type; /* type of memory segment */
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} map[BOOT_MEM_MAP_MAX];
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};
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extern struct boot_mem_map boot_mem_map;
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extern void add_memory_region(phys_t start, phys_t size, long type);
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extern void prom_init(void);
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extern void prom_free_prom_memory(void);
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extern void free_init_pages(const char *what,
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unsigned long begin, unsigned long end);
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/*
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* Initial kernel command line, usually setup by prom_init()
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*/
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extern char arcs_cmdline[COMMAND_LINE_SIZE];
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/*
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* Registers a0, a1, a3 and a4 as passed to the kernel entry by firmware
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*/
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extern unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
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/*
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* Platform memory detection hook called by setup_arch
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*/
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extern void plat_mem_setup(void);
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#ifdef CONFIG_SWIOTLB
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/*
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* Optional platform hook to call swiotlb_setup().
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*/
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extern void plat_swiotlb_setup(void);
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#else
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static inline void plat_swiotlb_setup(void) {}
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#endif /* CONFIG_SWIOTLB */
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#endif /* _ASM_BOOTINFO_H */
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