package/boot/uboot-lantiq/patches/0033-MIPS-lantiq-reduce-stack-size.patch

   1 From ad739ffebf689abdbcddbe4e1b0bf847d7931a92 Mon Sep 17 00:00:00 2001
   2 From: Mathias Kresin <dev@kresin.me>
   3 Date: Fri, 20 Jan 2017 13:59:53 +0100
   4 Subject: [PATCH] MIPS: lantiq: reduce stack size
   5
   6 On lantiq a lot of stuff expects to be loaded to and executed at
   7 0x80002000, including our own second stage bootloader.
   8
   9 For all build u-boots, the initial stack pointer is at 0x80008000. After
  10 loading data to 0x80002000, every further stack operation corrupts the
  11 loaded code.
  12
  13 Set the initial stack pointer to 0x80002000, to not overwrite code
  14 loaded in memory. A stack of 0x2000 bytes has been proven as enough in
  15 all done tests.
  16
  17 Signed-off-by: Mathias Kresin <dev@kresin.me>
  18 ---
  19  arch/mips/include/asm/arch-arx100/config.h | 2 +-
  20  arch/mips/include/asm/arch-danube/config.h | 2 +-
  21  arch/mips/include/asm/arch-vrx200/config.h | 2 +-
  22  3 files changed, 3 insertions(+), 3 deletions(-)
  23
  24 --- a/arch/mips/include/asm/arch-arx100/config.h
  25 +++ b/arch/mips/include/asm/arch-arx100/config.h
  26 @@ -66,7 +66,7 @@
  27  #define CONFIG_SYS_MEMTEST_END         0x82000000
  28  #define CONFIG_SYS_LOAD_ADDR           0x81000000
  29  #define CONFIG_SYS_LOAD_SIZE           (2 * 1024 * 1024)
  30 -#define CONFIG_SYS_INIT_SP_OFFSET      (32 * 1024)
  31 +#define CONFIG_SYS_INIT_SP_OFFSET      0x2000
  32
  33  /* SRAM */
  34  #define CONFIG_SYS_SRAM_BASE           0xBE1A0000
  35 --- a/arch/mips/include/asm/arch-danube/config.h
  36 +++ b/arch/mips/include/asm/arch-danube/config.h
  37 @@ -57,7 +57,7 @@
  38  #define CONFIG_SYS_MEMTEST_END         0x82000000
  39  #define CONFIG_SYS_LOAD_ADDR           0x81000000
  40  #define CONFIG_SYS_LOAD_SIZE           (2 * 1024 * 1024)
  41 -#define CONFIG_SYS_INIT_SP_OFFSET      0x4000
  42 +#define CONFIG_SYS_INIT_SP_OFFSET      0x2000
  43
  44  /* SRAM */
  45  #define CONFIG_SYS_SRAM_BASE           0xBE1A0000
  46 --- a/arch/mips/include/asm/arch-vrx200/config.h
  47 +++ b/arch/mips/include/asm/arch-vrx200/config.h
  48 @@ -69,7 +69,7 @@
  49  #define CONFIG_SYS_MEMTEST_END         0x82000000
  50  #define CONFIG_SYS_LOAD_ADDR           0x81000000
  51  #define CONFIG_SYS_LOAD_SIZE           (2 * 1024 * 1024)
  52 -#define CONFIG_SYS_INIT_SP_OFFSET      (32 * 1024)
  53 +#define CONFIG_SYS_INIT_SP_OFFSET      0x2000
  54
  55  /* SRAM */
  56  #define CONFIG_SYS_SRAM_BASE           0xBE220000