(nuttx-apps) branch master updated: system/fastboot: add an optional fixed download buffer address

[xiaoxiang]

This is an automated email from the ASF dual-hosted git repository.

xiaoxiang781216 pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/nuttx-apps.git


The following commit(s) were added to refs/heads/master by this push:
     new 91950ed6f system/fastboot: add an optional fixed download buffer 
address
91950ed6f is described below

commit 91950ed6fc578494d44716b19fb07c5e76aa353f
Author: wangjianyu3 <wangjian...@xiaomi.com>
AuthorDate: Mon Oct 26 00:22:19 2026 +0800

    system/fastboot: add an optional fixed download buffer address
    
    The download buffer is malloc'ed by default.  Boards that would rather
    keep a large buffer out of the heap can set
    SYSTEM_FASTBOOTD_DOWNLOAD_ADDR to a reserved region of
    SYSTEM_FASTBOOTD_DOWNLOAD_MAX bytes, as U-Boot and LK do; fastbootd
    then neither allocates nor frees it.  The default 0 keeps malloc.
    
    Assisted-by: OpenCode:mimo-v2.6-pro
    Signed-off-by: wangjianyu3 <wangjian...@xiaomi.com>
---
 system/fastboot/Kconfig    | 4 ++++
 system/fastboot/fastboot.c | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/system/fastboot/Kconfig b/system/fastboot/Kconfig
index fa551d26f..ff4bc1caa 100644
--- a/system/fastboot/Kconfig
+++ b/system/fastboot/Kconfig
@@ -30,6 +30,10 @@ config SYSTEM_FASTBOOTD_DOWNLOAD_MAX
        int "fastboot download buffer size"
        default 40960
 
+config SYSTEM_FASTBOOTD_DOWNLOAD_ADDR
+       hex "fixed download buffer address (0 = malloc)"
+       default 0x0
+
 config SYSTEM_FASTBOOTD_USB
        bool "Fastboot USB transport"
        default y
diff --git a/system/fastboot/fastboot.c b/system/fastboot/fastboot.c
index 7a7635ea3..4364ef4d0 100644
--- a/system/fastboot/fastboot.c
+++ b/system/fastboot/fastboot.c
@@ -1606,7 +1606,12 @@ static int fastboot_context_initialize(FAR struct 
fastboot_ctx_s *ctx,
       ctx->tran_fd[0]      = -1;
       ctx->tran_fd[1]      = -1;
 
+#if CONFIG_SYSTEM_FASTBOOTD_DOWNLOAD_ADDR != 0
+      ctx->download_buffer =
+        (FAR void *)(uintptr_t)CONFIG_SYSTEM_FASTBOOTD_DOWNLOAD_ADDR;
+#else
       ctx->download_buffer = malloc(CONFIG_SYSTEM_FASTBOOTD_DOWNLOAD_MAX);
+#endif
       if (ctx->download_buffer == NULL)
         {
           fb_err("ERROR: Could not allocate the memory.\n");
@@ -1616,7 +1621,9 @@ static int fastboot_context_initialize(FAR struct 
fastboot_ctx_s *ctx,
       ret = ctx->ops->init(ctx);
       if (ret < 0)
         {
+#if CONFIG_SYSTEM_FASTBOOTD_DOWNLOAD_ADDR == 0
           free(ctx->download_buffer);
+#endif
           ctx->download_buffer = NULL;
           ctx->ops->deinit(ctx);
         }
@@ -1633,7 +1640,9 @@ static void fastboot_context_deinit(FAR struct 
fastboot_ctx_s *ctx,
       if (ctx->download_buffer)
         {
           ctx->ops->deinit(ctx);
+#if CONFIG_SYSTEM_FASTBOOTD_DOWNLOAD_ADDR == 0
           free(ctx->download_buffer);
+#endif
         }
     }
 }