leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
cfa1971977
u-boot/include/lmb.h

136 lines
4.0 KiB
C
Raw Normal View History

SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-06 21:58:06 +00:00
/* SPDX-License-Identifier: GPL-2.0+ */
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
#ifndef _LINUX_LMB_H
#define _LINUX_LMB_H
#ifdef __KERNEL__
#include <asm/types.h>
lmb: handle more than one DRAM BANK This fixes the automatic lmb initialization and reservation for boards with more than one DRAM bank. This fixes the CVE-2018-18439 and -18440 fixes that only allowed to load files into the firs DRAM bank from fs and via tftp. Found-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
2019-01-26 21:13:04 +00:00
#include <asm/u-boot.h>
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
/*
* Logical memory blocks.
*
* Copyright (C) 2001 Peter Bergner, IBM Corp.
*/
lmb: Add support of flags for no-map properties Add "flags" in lmb_property to save the "no-map" property of reserved region and a new function lmb_reserve_flags() to check this flag. The default allocation use flags = LMB_NONE. The adjacent reserved memory region are merged only when they have the same flags value. This patch is partially based on flags support done in Linux kernel mm/memblock .c (previously lmb.c); it is why LMB_NOMAP = 0x4, it is aligned with MEMBLOCK_NOMAP value. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-05-07 12:50:29 +00:00
/**
* enum lmb_flags - definition of memory region attributes
* @LMB_NONE: no special request
* @LMB_NOMAP: don't add to mmu configuration
*/
enum lmb_flags {
LMB_NONE = 0x0,
LMB_NOMAP = 0x4,
};
lmb: Add 2 config to define the max number of regions Add 2 configs CONFIG_LMB_MEMORY_REGIONS and CONFIG_LMB_RESERVED_REGIONS to change independently the max number of the regions in lmb library. When CONFIG_LMB_USE_MAX_REGIONS=y, move the lmb property arrays to struct lmb and manage the array size with the element 'max' of struct lmb_region; their are still allocated in stack. When CONFIG_LMB_USE_MAX_REGIONS=n, keep the current location in struct lmb_region to allow compiler optimization. Increase CONFIG_LMB_RESERVED_REGIONS is useful to avoid lmb errors in bootm when the number of reserved regions (not adjacent) is reached: + 1 region for relocated U-Boot + 1 region for initrd + 1 region for relocated linux device tree + reserved memory regions present in Linux device tree. The current limit of 8 regions is reached with only 5 reserved regions in DT. see Linux kernel commit bf23c51f1f49 ("memblock: Move memblock arrays to static storage in memblock.c and make their size a variable") Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-10 09:16:31 +00:00
/**
* struct lmb_property - Description of one region.
*
* @base: Base address of the region.
* @size: Size of the region
*/
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
struct lmb_property {
Change lmb to use phys_size_t/phys_addr_t This updates the lmb code to use phys_size_t and phys_addr_t instead of unsigned long. Other code which interacts with this code, like getenv_bootm_size() is also updated. Booted on MPC8641HPCN, build-tested ppc, arm, mips. Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
2008-06-10 01:37:18 +00:00
phys_addr_t base;
phys_size_t size;
lmb: Add support of flags for no-map properties Add "flags" in lmb_property to save the "no-map" property of reserved region and a new function lmb_reserve_flags() to check this flag. The default allocation use flags = LMB_NONE. The adjacent reserved memory region are merged only when they have the same flags value. This patch is partially based on flags support done in Linux kernel mm/memblock .c (previously lmb.c); it is why LMB_NOMAP = 0x4, it is aligned with MEMBLOCK_NOMAP value. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-05-07 12:50:29 +00:00
enum lmb_flags flags;
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
};
lmb: Add 2 config to define the max number of regions Add 2 configs CONFIG_LMB_MEMORY_REGIONS and CONFIG_LMB_RESERVED_REGIONS to change independently the max number of the regions in lmb library. When CONFIG_LMB_USE_MAX_REGIONS=y, move the lmb property arrays to struct lmb and manage the array size with the element 'max' of struct lmb_region; their are still allocated in stack. When CONFIG_LMB_USE_MAX_REGIONS=n, keep the current location in struct lmb_region to allow compiler optimization. Increase CONFIG_LMB_RESERVED_REGIONS is useful to avoid lmb errors in bootm when the number of reserved regions (not adjacent) is reached: + 1 region for relocated U-Boot + 1 region for initrd + 1 region for relocated linux device tree + reserved memory regions present in Linux device tree. The current limit of 8 regions is reached with only 5 reserved regions in DT. see Linux kernel commit bf23c51f1f49 ("memblock: Move memblock arrays to static storage in memblock.c and make their size a variable") Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-10 09:16:31 +00:00
/**
* struct lmb_region - Description of a set of region.
*
* @cnt: Number of regions.
* @max: Size of the region array, max value of cnt.
* @region: Array of the region properties
*/
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
struct lmb_region {
unsigned long cnt;
lmb: add a max parameter in the struct lmb_region Add a max parameter in lmb_region struct to handle test in lmb_add_region without using the MAX_LMB_REGIONS define. This patch allows to modify these size independently for memory of reserved regions in the next patches. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-10 09:16:27 +00:00
unsigned long max;
lmb: Add 2 config to define the max number of regions Add 2 configs CONFIG_LMB_MEMORY_REGIONS and CONFIG_LMB_RESERVED_REGIONS to change independently the max number of the regions in lmb library. When CONFIG_LMB_USE_MAX_REGIONS=y, move the lmb property arrays to struct lmb and manage the array size with the element 'max' of struct lmb_region; their are still allocated in stack. When CONFIG_LMB_USE_MAX_REGIONS=n, keep the current location in struct lmb_region to allow compiler optimization. Increase CONFIG_LMB_RESERVED_REGIONS is useful to avoid lmb errors in bootm when the number of reserved regions (not adjacent) is reached: + 1 region for relocated U-Boot + 1 region for initrd + 1 region for relocated linux device tree + reserved memory regions present in Linux device tree. The current limit of 8 regions is reached with only 5 reserved regions in DT. see Linux kernel commit bf23c51f1f49 ("memblock: Move memblock arrays to static storage in memblock.c and make their size a variable") Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-10 09:16:31 +00:00
#if IS_ENABLED(CONFIG_LMB_USE_MAX_REGIONS)
lmb: correct size of the regions array As in lmb_region, cnt < max and in the lmb library use region[i] only with i in 0...cnt, this region array size can be reduced by 1 element without overflow. This patch allows to reduce the struct lmb size. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-10 09:16:29 +00:00
struct lmb_property region[CONFIG_LMB_MAX_REGIONS];
lmb: Add 2 config to define the max number of regions Add 2 configs CONFIG_LMB_MEMORY_REGIONS and CONFIG_LMB_RESERVED_REGIONS to change independently the max number of the regions in lmb library. When CONFIG_LMB_USE_MAX_REGIONS=y, move the lmb property arrays to struct lmb and manage the array size with the element 'max' of struct lmb_region; their are still allocated in stack. When CONFIG_LMB_USE_MAX_REGIONS=n, keep the current location in struct lmb_region to allow compiler optimization. Increase CONFIG_LMB_RESERVED_REGIONS is useful to avoid lmb errors in bootm when the number of reserved regions (not adjacent) is reached: + 1 region for relocated U-Boot + 1 region for initrd + 1 region for relocated linux device tree + reserved memory regions present in Linux device tree. The current limit of 8 regions is reached with only 5 reserved regions in DT. see Linux kernel commit bf23c51f1f49 ("memblock: Move memblock arrays to static storage in memblock.c and make their size a variable") Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-10 09:16:31 +00:00
#else
struct lmb_property *region;
#endif
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
};
lmb: Add 2 config to define the max number of regions Add 2 configs CONFIG_LMB_MEMORY_REGIONS and CONFIG_LMB_RESERVED_REGIONS to change independently the max number of the regions in lmb library. When CONFIG_LMB_USE_MAX_REGIONS=y, move the lmb property arrays to struct lmb and manage the array size with the element 'max' of struct lmb_region; their are still allocated in stack. When CONFIG_LMB_USE_MAX_REGIONS=n, keep the current location in struct lmb_region to allow compiler optimization. Increase CONFIG_LMB_RESERVED_REGIONS is useful to avoid lmb errors in bootm when the number of reserved regions (not adjacent) is reached: + 1 region for relocated U-Boot + 1 region for initrd + 1 region for relocated linux device tree + reserved memory regions present in Linux device tree. The current limit of 8 regions is reached with only 5 reserved regions in DT. see Linux kernel commit bf23c51f1f49 ("memblock: Move memblock arrays to static storage in memblock.c and make their size a variable") Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-10 09:16:31 +00:00
/**
* struct lmb - Logical memory block handle.
*
* Clients provide storage for Logical memory block (lmb) handles.
* The content of the structure is managed by the lmb library.
* A lmb struct is initialized by lmb_init() functions.
* The lmb struct is passed to all other lmb APIs.
*
* @memory: Description of memory regions.
* @reserved: Description of reserved regions.
* @memory_regions: Array of the memory regions (statically allocated)
* @reserved_regions: Array of the reserved regions (statically allocated)
*/
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
struct lmb {
struct lmb_region memory;
struct lmb_region reserved;
lmb: Add 2 config to define the max number of regions Add 2 configs CONFIG_LMB_MEMORY_REGIONS and CONFIG_LMB_RESERVED_REGIONS to change independently the max number of the regions in lmb library. When CONFIG_LMB_USE_MAX_REGIONS=y, move the lmb property arrays to struct lmb and manage the array size with the element 'max' of struct lmb_region; their are still allocated in stack. When CONFIG_LMB_USE_MAX_REGIONS=n, keep the current location in struct lmb_region to allow compiler optimization. Increase CONFIG_LMB_RESERVED_REGIONS is useful to avoid lmb errors in bootm when the number of reserved regions (not adjacent) is reached: + 1 region for relocated U-Boot + 1 region for initrd + 1 region for relocated linux device tree + reserved memory regions present in Linux device tree. The current limit of 8 regions is reached with only 5 reserved regions in DT. see Linux kernel commit bf23c51f1f49 ("memblock: Move memblock arrays to static storage in memblock.c and make their size a variable") Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-10 09:16:31 +00:00
#if !IS_ENABLED(CONFIG_LMB_USE_MAX_REGIONS)
struct lmb_property memory_regions[CONFIG_LMB_MEMORY_REGIONS];
struct lmb_property reserved_regions[CONFIG_LMB_RESERVED_REGIONS];
#endif
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
};
extern void lmb_init(struct lmb *lmb);
treewide: convert bd_t to struct bd_info by coccinelle The Linux coding style guide (Documentation/process/coding-style.rst) clearly says: It's a **mistake** to use typedef for structures and pointers. Besides, using typedef for structures is annoying when you try to make headers self-contained. Let's say you have the following function declaration in a header: void foo(bd_t *bd); This is not self-contained since bd_t is not defined. To tell the compiler what 'bd_t' is, you need to include <asm/u-boot.h> #include <asm/u-boot.h> void foo(bd_t *bd); Then, the include direcective pulls in more bloat needlessly. If you use 'struct bd_info' instead, it is enough to put a forward declaration as follows: struct bd_info; void foo(struct bd_info *bd); Right, typedef'ing bd_t is a mistake. I used coccinelle to generate this commit. The semantic patch that makes this change is as follows: <smpl> @@ typedef bd_t; @@ -bd_t +struct bd_info </smpl> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-06-26 06:13:33 +00:00
extern void lmb_init_and_reserve(struct lmb *lmb, struct bd_info *bd,
void *fdt_blob);
lmb: handle more than one DRAM BANK This fixes the automatic lmb initialization and reservation for boards with more than one DRAM bank. This fixes the CVE-2018-18439 and -18440 fixes that only allowed to load files into the firs DRAM bank from fs and via tftp. Found-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
2019-01-26 21:13:04 +00:00
extern void lmb_init_and_reserve_range(struct lmb *lmb, phys_addr_t base,
phys_size_t size, void *fdt_blob);
Change lmb to use phys_size_t/phys_addr_t This updates the lmb code to use phys_size_t and phys_addr_t instead of unsigned long. Other code which interacts with this code, like getenv_bootm_size() is also updated. Booted on MPC8641HPCN, build-tested ppc, arm, mips. Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
2008-06-10 01:37:18 +00:00
extern long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size);
extern long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size);
lmb: Add support of flags for no-map properties Add "flags" in lmb_property to save the "no-map" property of reserved region and a new function lmb_reserve_flags() to check this flag. The default allocation use flags = LMB_NONE. The adjacent reserved memory region are merged only when they have the same flags value. This patch is partially based on flags support done in Linux kernel mm/memblock .c (previously lmb.c); it is why LMB_NOMAP = 0x4, it is aligned with MEMBLOCK_NOMAP value. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-05-07 12:50:29 +00:00
/**
* lmb_reserve_flags - Reserve one region with a specific flags bitfield.
*
* @lmb the logical memory block struct
* @base base address of the memory region
* @size size of the memory region
* @flags flags for the memory region
* @return 0 if OK, > 0 for coalesced region or a negative error code.
*/
long lmb_reserve_flags(struct lmb *lmb, phys_addr_t base,
phys_size_t size, enum lmb_flags flags);
Change lmb to use phys_size_t/phys_addr_t This updates the lmb code to use phys_size_t and phys_addr_t instead of unsigned long. Other code which interacts with this code, like getenv_bootm_size() is also updated. Booted on MPC8641HPCN, build-tested ppc, arm, mips. Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
2008-06-10 01:37:18 +00:00
extern phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align);
extern phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
phys_addr_t max_addr);
extern phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
phys_addr_t max_addr);
lib: lmb: extend lmb for checks at load time This adds two new functions, lmb_alloc_addr and lmb_get_unreserved_size. lmb_alloc_addr behaves like lmb_alloc, but it tries to allocate a pre-specified address range. Unlike lmb_reserve, this address range must be inside one of the memory ranges that has been set up with lmb_add. lmb_get_unreserved_size returns the number of bytes that can be used up to the next reserved region or the end of valid ram. This can be 0 if the address passed is reserved. Added test for these new functions. Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
2019-01-14 21:38:18 +00:00
extern phys_addr_t lmb_alloc_addr(struct lmb *lmb, phys_addr_t base,
phys_size_t size);
lib: lmb: rename lmb_get_unreserved_size to lmb_get_free_size As a follow-up, change the name of the newly introduced function 'lmb_get_unreserved_size' to 'lmb_get_free_size', which is more appropriate. Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> [trini: Fix test/lib/lmb.c] Signed-off-by: Tom Rini <trini@konsulko.com>
2019-01-21 19:29:55 +00:00
extern phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr);
Change lmb to use phys_size_t/phys_addr_t This updates the lmb code to use phys_size_t and phys_addr_t instead of unsigned long. Other code which interacts with this code, like getenv_bootm_size() is also updated. Booted on MPC8641HPCN, build-tested ppc, arm, mips. Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
2008-06-10 01:37:18 +00:00
extern int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr);
lmb: add lmb_is_reserved_flags Add a new function lmb_is_reserved_flags to check if an address is reserved with a specific flags. This function can be used to check if an address was reserved with no-map flags with: lmb_is_reserved_flags(lmb, addr, LMB_NOMAP); Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-05-07 12:50:30 +00:00
/**
* lmb_is_reserved_flags - test if tha address is in reserved region with a bitfield flag
*
* @lmb the logical memory block struct
* @addr address to be tested
* @flags flags bitfied to be tested
* @return 0 if not reserved or reserved without the requested flag else 1
*/
int lmb_is_reserved_flags(struct lmb *lmb, phys_addr_t addr, int flags);
Fix LMB type issues The LMB code now uses phys_addr_t and phys_size_t. Also, there were a couple of casting problems in the bootm code that called the LMB functions. Signed-off-by: Andy Fleming <afleming@freescale.com>
2008-07-07 19:24:39 +00:00
extern long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
extern void lmb_dump_all(struct lmb *lmb);
lmb/bdinfo: dump lmb info via bdinfo Dump lmb status from the bdinfo command. This is useful for seeing the reserved memory regions from the u-boot cmdline. Signed-off-by: Tero Kristo <t-kristo@ti.com>
2020-07-20 08:10:45 +00:00
extern void lmb_dump_all_force(struct lmb *lmb);
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
Change lmb to use phys_size_t/phys_addr_t This updates the lmb code to use phys_size_t and phys_addr_t instead of unsigned long. Other code which interacts with this code, like getenv_bootm_size() is also updated. Booted on MPC8641HPCN, build-tested ppc, arm, mips. Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
2008-06-10 01:37:18 +00:00
static inline phys_size_t
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
{
return type->region[region_nr].size;
}
lmb: only force on arches that use it Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-11-03 16:35:59 +00:00
void board_lmb_reserve(struct lmb *lmb);
void arch_lmb_reserve(struct lmb *lmb);
lmb: Add support of flags for no-map properties Add "flags" in lmb_property to save the "no-map" property of reserved region and a new function lmb_reserve_flags() to check this flag. The default allocation use flags = LMB_NONE. The adjacent reserved memory region are merged only when they have the same flags value. This patch is partially based on flags support done in Linux kernel mm/memblock .c (previously lmb.c); it is why LMB_NOMAP = 0x4, it is aligned with MEMBLOCK_NOMAP value. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-05-07 12:50:29 +00:00
/* Low level functions */
static inline bool lmb_is_nomap(struct lmb_property *m)
{
return m->flags & LMB_NOMAP;
}
[new uImage] Introduce lmb from linux kernel for memory mgmt of boot images Introduce the LMB lib used on PPC in the kernel as a clean way to manage the memory spaces used by various boot images and structures. This code will allow us to simplify the code in bootm and its support functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-02-28 03:51:47 +00:00
#endif /* __KERNEL__ */
#endif /* _LINUX_LMB_H */
Reference in New Issue Copy Permalink