[U-Boot] [PATCH V3] sandbox: Add improved RAM simulation
Simon Glass
sjg at chromium.org
Thu Nov 3 23:55:20 CET 2011
Hi Matthias,
On Thu, Nov 3, 2011 at 11:02 AM, Matthias Weisser <weisserm at arcor.de> wrote:
> Using mmap to allocate memory from the OS for RAM simulation we can use
> u-boot own malloc implementation.
>
> Signed-off-by: Matthias Weisser <weisserm at arcor.de>
> ---
> Changes in V3:
> Fixed a build warning
>
> Changes in V2:
> Removed the address hint for mmap
> Removed the special handling of dlmalloc in common
> Set gd->bd->bi_dram[0].start to 0 again
>
> This patch also fixes the runtime error of sandbox introduced in
> 2d01dd9 omap: spl: fix build break due to changes in FAT
>
> arch/sandbox/cpu/os.c | 7 +++++++
> arch/sandbox/lib/board.c | 17 ++++++++++-------
> common/Makefile | 3 ---
> include/os.h | 8 ++++++++
> 4 files changed, 25 insertions(+), 10 deletions(-)
Unfortunately the terminal changes got in before you - can you please
rebase and resubmit?
Otherwise I have tested this again and it work well, thank you.
Regards,
Simon
>
> diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
> index 6c175d4..05f91f2 100644
> --- a/arch/sandbox/cpu/os.c
> +++ b/arch/sandbox/cpu/os.c
> @@ -24,6 +24,7 @@
> #include <unistd.h>
> #include <sys/types.h>
> #include <sys/stat.h>
> +#include <sys/mman.h>
>
> #include <os.h>
>
> @@ -53,3 +54,9 @@ void os_exit(int exit_code)
> {
> exit(exit_code);
> }
> +
> +void *os_malloc(size_t length)
> +{
> + return mmap(NULL, length, PROT_READ | PROT_WRITE,
> + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
> +}
> diff --git a/arch/sandbox/lib/board.c b/arch/sandbox/lib/board.c
> index ae5a517..b7997e9 100644
> --- a/arch/sandbox/lib/board.c
> +++ b/arch/sandbox/lib/board.c
> @@ -45,8 +45,12 @@
> #include <version.h>
> #include <serial.h>
>
> +#include <os.h>
> +
> DECLARE_GLOBAL_DATA_PTR;
>
> +static gd_t gd_mem;
> +
> /************************************************************************
> * Init Utilities *
> ************************************************************************
> @@ -147,7 +151,7 @@ void board_init_f(ulong bootflag)
> uchar *mem;
> unsigned long addr_sp, addr, size;
>
> - gd = malloc(sizeof(gd_t));
> + gd = &gd_mem;
> assert(gd);
>
> memset((void *)gd, 0, sizeof(gd_t));
> @@ -158,7 +162,8 @@ void board_init_f(ulong bootflag)
> }
>
> size = CONFIG_SYS_SDRAM_SIZE;
> - mem = malloc(size);
> + mem = os_malloc(CONFIG_SYS_SDRAM_SIZE);
> +
> assert(mem);
> gd->ram_buf = mem;
> addr = (ulong)(mem + size);
> @@ -214,11 +219,9 @@ void board_init_r(gd_t *id, ulong dest_addr)
> post_output_backlog();
> #endif
>
> -#if 0 /* Sandbox uses system malloc for now */
> - /* The Malloc area is immediately below the monitor copy in DRAM */
> - malloc_start = dest_addr - TOTAL_MALLOC_LEN;
> - mem_malloc_init(malloc_start, TOTAL_MALLOC_LEN);
> -#endif
> + /* The Malloc area is at the top of simulated DRAM */
> + mem_malloc_init((ulong)gd->ram_buf + gd->ram_size - TOTAL_MALLOC_LEN,
> + TOTAL_MALLOC_LEN);
>
> /* initialize environment */
> env_relocate();
> diff --git a/common/Makefile b/common/Makefile
> index 1b672ad..015c17e 100644
> --- a/common/Makefile
> +++ b/common/Makefile
> @@ -29,9 +29,6 @@ LIB = $(obj)libcommon.o
> ifndef CONFIG_SPL_BUILD
> COBJS-y += main.o
> COBJS-y += command.o
> -ifndef CONFIG_SANDBOX
> -COBJS-y += dlmalloc.o
> -endif
> COBJS-y += exports.o
> COBJS-$(CONFIG_SYS_HUSH_PARSER) += hush.o
> COBJS-y += image.o
> diff --git a/include/os.h b/include/os.h
> index 3ea6d2d..2bb2fb7 100644
> --- a/include/os.h
> +++ b/include/os.h
> @@ -71,3 +71,11 @@ int os_close(int fd);
> * @param exit_code exit code for U-Boot
> */
> void os_exit(int exit_code);
> +
> +/**
> + * Acquires some memory from the underlying os.
> + *
> + * \param length Number of bytes to be allocated
> + * \return Pointer to length bytes or NULL on error
> + */
> +void *os_malloc(size_t length);
> --
> 1.7.4.1
>
>
More information about the U-Boot
mailing list