All of the current definitions of arch_lmb_reserve() are doing the same thing -- reserve the region of memory occupied by U-Boot, starting from the current stack address to the ram_top. Introduce a function lmb_reserve_uboot_region() which does this, and do away with the arch_lmb_reserve() function.
Instead of using the current value of stack pointer for starting the reserved region, have a fixed value, considering the stack size config value.
Signed-off-by: Sughosh Ganu sughosh.ganu@linaro.org Reviewed-by: Simon Glass sjg@chromium.org --- Changes since V3: * s/16384/SZ_16K in lmb_reserve_uboot_region(). * Fix the corresponding comment for the above change. * Fixed the alignment in lmb_reserve_uboot_region() as suggested by checkpatch.
arch/arc/lib/cache.c | 14 ------- arch/arm/lib/stack.c | 14 ------- arch/m68k/lib/bootm.c | 17 -------- arch/microblaze/lib/bootm.c | 14 ------- arch/mips/lib/bootm.c | 15 ------- arch/nios2/lib/bootm.c | 13 ------ arch/powerpc/lib/bootm.c | 9 ---- arch/riscv/lib/bootm.c | 13 ------ arch/sh/lib/bootm.c | 13 ------ arch/x86/lib/bootm.c | 18 -------- arch/xtensa/lib/bootm.c | 13 ------ include/lmb.h | 2 - lib/lmb.c | 84 ++++++++++++++++++------------------- 13 files changed, 42 insertions(+), 197 deletions(-)
diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c index 5151af917a..5169fc627f 100644 --- a/arch/arc/lib/cache.c +++ b/arch/arc/lib/cache.c @@ -10,7 +10,6 @@ #include <linux/compiler.h> #include <linux/kernel.h> #include <linux/log2.h> -#include <lmb.h> #include <asm/arcregs.h> #include <asm/arc-bcr.h> #include <asm/cache.h> @@ -820,16 +819,3 @@ void sync_n_cleanup_cache_all(void)
__ic_entire_invalidate(); } - -static ulong get_sp(void) -{ - ulong ret; - - asm("mov %0, sp" : "=r"(ret) : ); - return ret; -} - -void arch_lmb_reserve(void) -{ - arch_lmb_reserve_generic(get_sp(), gd->ram_top, 4096); -} diff --git a/arch/arm/lib/stack.c b/arch/arm/lib/stack.c index 87d5c962d7..2b21ec0734 100644 --- a/arch/arm/lib/stack.c +++ b/arch/arm/lib/stack.c @@ -11,7 +11,6 @@ * Marius Groeger mgroeger@sysgo.de */ #include <init.h> -#include <lmb.h> #include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR; @@ -33,16 +32,3 @@ int arch_reserve_stacks(void)
return 0; } - -static ulong get_sp(void) -{ - ulong ret; - - asm("mov %0, sp" : "=r"(ret) : ); - return ret; -} - -void arch_lmb_reserve(void) -{ - arch_lmb_reserve_generic(get_sp(), gd->ram_top, 16384); -} diff --git a/arch/m68k/lib/bootm.c b/arch/m68k/lib/bootm.c index aee95f1e18..3dcff8076e 100644 --- a/arch/m68k/lib/bootm.c +++ b/arch/m68k/lib/bootm.c @@ -9,7 +9,6 @@ #include <command.h> #include <env.h> #include <image.h> -#include <lmb.h> #include <log.h> #include <asm/global_data.h> #include <u-boot/zlib.h> @@ -27,14 +26,8 @@ DECLARE_GLOBAL_DATA_PTR; #define LINUX_MAX_ENVS 256 #define LINUX_MAX_ARGS 256
-static ulong get_sp (void); static void set_clocks_in_mhz (struct bd_info *kbd);
-void arch_lmb_reserve(void) -{ - arch_lmb_reserve_generic(get_sp(), gd->ram_top, 1024); -} - int do_bootm_linux(int flag, struct bootm_info *bmi) { struct bootm_headers *images = bmi->images; @@ -88,16 +81,6 @@ error: return 1; }
-static ulong get_sp (void) -{ - ulong sp; - - asm("movel %%a7, %%d0\n" - "movel %%d0, %0\n": "=d"(sp): :"%d0"); - - return sp; -} - static void set_clocks_in_mhz (struct bd_info *kbd) { char *s; diff --git a/arch/microblaze/lib/bootm.c b/arch/microblaze/lib/bootm.c index ce96bca28f..4879a41aab 100644 --- a/arch/microblaze/lib/bootm.c +++ b/arch/microblaze/lib/bootm.c @@ -15,7 +15,6 @@ #include <fdt_support.h> #include <hang.h> #include <image.h> -#include <lmb.h> #include <log.h> #include <asm/cache.h> #include <asm/global_data.h> @@ -24,19 +23,6 @@
DECLARE_GLOBAL_DATA_PTR;
-static ulong get_sp(void) -{ - ulong ret; - - asm("addik %0, r1, 0" : "=r"(ret) : ); - return ret; -} - -void arch_lmb_reserve(void) -{ - arch_lmb_reserve_generic(get_sp(), gd->ram_top, 4096); -} - static void boot_jump_linux(struct bootm_headers *images, int flag) { void (*thekernel)(char *cmdline, ulong rd, ulong dt); diff --git a/arch/mips/lib/bootm.c b/arch/mips/lib/bootm.c index 8fb3a3923f..8719510002 100644 --- a/arch/mips/lib/bootm.c +++ b/arch/mips/lib/bootm.c @@ -9,7 +9,6 @@ #include <env.h> #include <image.h> #include <fdt_support.h> -#include <lmb.h> #include <log.h> #include <asm/addrspace.h> #include <asm/global_data.h> @@ -28,20 +27,6 @@ static char **linux_env; static char *linux_env_p; static int linux_env_idx;
-static ulong arch_get_sp(void) -{ - ulong ret; - - __asm__ __volatile__("move %0, $sp" : "=r"(ret) : ); - - return ret; -} - -void arch_lmb_reserve(void) -{ - arch_lmb_reserve_generic(arch_get_sp(), gd->ram_top, 4096); -} - static void linux_cmdline_init(void) { linux_argc = 1; diff --git a/arch/nios2/lib/bootm.c b/arch/nios2/lib/bootm.c index d33d45d28f..71319839ba 100644 --- a/arch/nios2/lib/bootm.c +++ b/arch/nios2/lib/bootm.c @@ -64,16 +64,3 @@ int do_bootm_linux(int flag, struct bootm_info *bmi)
return 1; } - -static ulong get_sp(void) -{ - ulong ret; - - asm("mov %0, sp" : "=r"(ret) : ); - return ret; -} - -void arch_lmb_reserve(void) -{ - arch_lmb_reserve_generic(get_sp(), gd->ram_top, 4096); -} diff --git a/arch/powerpc/lib/bootm.c b/arch/powerpc/lib/bootm.c index 8f21cdb0a5..dc44bf3ab3 100644 --- a/arch/powerpc/lib/bootm.c +++ b/arch/powerpc/lib/bootm.c @@ -36,7 +36,6 @@
DECLARE_GLOBAL_DATA_PTR;
-static ulong get_sp (void); extern void ft_fixup_num_cores(void *blob); static void set_clocks_in_mhz (struct bd_info *kbd);
@@ -210,14 +209,6 @@ int do_bootm_linux(int flag, struct bootm_info *bmi) return 0; }
-static ulong get_sp (void) -{ - ulong sp; - - asm( "mr %0,1": "=r"(sp) : ); - return sp; -} - static void set_clocks_in_mhz (struct bd_info *kbd) { char *s; diff --git a/arch/riscv/lib/bootm.c b/arch/riscv/lib/bootm.c index bbf62f9e05..82502972ee 100644 --- a/arch/riscv/lib/bootm.c +++ b/arch/riscv/lib/bootm.c @@ -133,16 +133,3 @@ int do_bootm_vxworks(int flag, struct bootm_info *bmi) { return do_bootm_linux(flag, bmi); } - -static ulong get_sp(void) -{ - ulong ret; - - asm("mv %0, sp" : "=r"(ret) : ); - return ret; -} - -void arch_lmb_reserve(void) -{ - arch_lmb_reserve_generic(get_sp(), gd->ram_top, 4096); -} diff --git a/arch/sh/lib/bootm.c b/arch/sh/lib/bootm.c index 44ac05988c..bb0f59e0aa 100644 --- a/arch/sh/lib/bootm.c +++ b/arch/sh/lib/bootm.c @@ -101,16 +101,3 @@ int do_bootm_linux(int flag, struct bootm_info *bmi) /* does not return */ return 1; } - -static ulong get_sp(void) -{ - ulong ret; - - asm("mov r15, %0" : "=r"(ret) : ); - return ret; -} - -void arch_lmb_reserve(void) -{ - arch_lmb_reserve_generic(get_sp(), gd->ram_top, 4096); -} diff --git a/arch/x86/lib/bootm.c b/arch/x86/lib/bootm.c index 114b31012e..55f581836d 100644 --- a/arch/x86/lib/bootm.c +++ b/arch/x86/lib/bootm.c @@ -253,21 +253,3 @@ int do_bootm_linux(int flag, struct bootm_info *bmi)
return boot_jump_linux(images); } - -static ulong get_sp(void) -{ - ulong ret; - -#if CONFIG_IS_ENABLED(X86_64) - asm("mov %%rsp, %0" : "=r"(ret) : ); -#else - asm("mov %%esp, %0" : "=r"(ret) : ); -#endif - - return ret; -} - -void arch_lmb_reserve(void) -{ - arch_lmb_reserve_generic(get_sp(), gd->ram_top, 4096); -} diff --git a/arch/xtensa/lib/bootm.c b/arch/xtensa/lib/bootm.c index bdbd6d4692..2958f20739 100644 --- a/arch/xtensa/lib/bootm.c +++ b/arch/xtensa/lib/bootm.c @@ -197,16 +197,3 @@ int do_bootm_linux(int flag, struct bootm_info *bmi)
return 1; } - -static ulong get_sp(void) -{ - ulong ret; - - asm("mov %0, a1" : "=r"(ret) : ); - return ret; -} - -void arch_lmb_reserve(void) -{ - arch_lmb_reserve_generic(get_sp(), gd->ram_top, 4096); -} diff --git a/include/lmb.h b/include/lmb.h index 2f155d706e..fb1a6db8e2 100644 --- a/include/lmb.h +++ b/include/lmb.h @@ -108,8 +108,6 @@ void lmb_dump_all(void); void lmb_dump_all_force(void);
void board_lmb_reserve(void); -void arch_lmb_reserve(void); -void arch_lmb_reserve_generic(ulong sp, ulong end, ulong align);
struct lmb *lmb_get(void); int lmb_push(struct lmb *store); diff --git a/lib/lmb.c b/lib/lmb.c index 686988e34f..dbbc19ede9 100644 --- a/lib/lmb.c +++ b/lib/lmb.c @@ -18,6 +18,7 @@ #include <asm/global_data.h> #include <asm/sections.h> #include <linux/kernel.h> +#include <linux/sizes.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -147,42 +148,6 @@ static void lmb_fix_over_lap_regions(struct alist *lmb_rgn_lst, lmb_remove_region(lmb_rgn_lst, r2); }
-void arch_lmb_reserve_generic(ulong sp, ulong end, ulong align) -{ - ulong bank_end; - int bank; - - /* - * Reserve memory from aligned address below the bottom of U-Boot stack - * until end of U-Boot area using LMB to prevent U-Boot from overwriting - * that memory. - */ - debug("## Current stack ends at 0x%08lx ", sp); - - /* adjust sp by 4K to be safe */ - sp -= align; - for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { - if (!gd->bd->bi_dram[bank].size || - sp < gd->bd->bi_dram[bank].start) - continue; - /* Watch out for RAM at end of address space! */ - bank_end = gd->bd->bi_dram[bank].start + - gd->bd->bi_dram[bank].size - 1; - if (sp > bank_end) - continue; - if (bank_end > end) - bank_end = end - 1; - - lmb_reserve_flags(sp, bank_end - sp + 1, LMB_NOOVERWRITE); - - if (gd->flags & GD_FLG_SKIP_RELOC) - lmb_reserve_flags((phys_addr_t)(uintptr_t)_start, - gd->mon_len, LMB_NOOVERWRITE); - - break; - } -} - /** * efi_lmb_reserve() - add reservations for EFI memory * @@ -215,10 +180,50 @@ static __maybe_unused int efi_lmb_reserve(void) return 0; }
+static void lmb_reserve_uboot_region(void) +{ + int bank; + ulong end, bank_end; + phys_addr_t rsv_start; + + rsv_start = gd->start_addr_sp - CONFIG_STACK_SIZE; + end = gd->ram_top; + + /* + * Reserve memory from aligned address below the bottom of U-Boot stack + * until end of RAM area to prevent LMB from overwriting that memory. + */ + debug("## Current stack ends at 0x%08lx ", (ulong)rsv_start); + + /* adjust sp by 16K to be safe */ + rsv_start -= SZ_16K; + for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { + if (!gd->bd->bi_dram[bank].size || + rsv_start < gd->bd->bi_dram[bank].start) + continue; + /* Watch out for RAM at end of address space! */ + bank_end = gd->bd->bi_dram[bank].start + + gd->bd->bi_dram[bank].size - 1; + if (rsv_start > bank_end) + continue; + if (bank_end > end) + bank_end = end - 1; + + lmb_reserve_flags(rsv_start, bank_end - rsv_start + 1, + LMB_NOOVERWRITE); + + if (gd->flags & GD_FLG_SKIP_RELOC) + lmb_reserve_flags((phys_addr_t)(uintptr_t)_start, + gd->mon_len, LMB_NOOVERWRITE); + + break; + } +} + static void lmb_reserve_common(void *fdt_blob) { - arch_lmb_reserve(); board_lmb_reserve(); + lmb_reserve_uboot_region();
if (CONFIG_IS_ENABLED(OF_LIBFDT) && fdt_blob) boot_fdt_add_mem_rsv_regions(fdt_blob); @@ -690,11 +695,6 @@ __weak void board_lmb_reserve(void) /* please define platform specific board_lmb_reserve() */ }
-__weak void arch_lmb_reserve(void) -{ - /* please define platform specific arch_lmb_reserve() */ -} - static int lmb_setup(void) { bool ret;