Link symbols as created by the link script can either be absolute or relative to the text start. This option switches between the two options so that we can support both.
As we convert architectures over to generic board, we can see if this option is actually needed, or whether it is possible to unify this feature also.
Signed-off-by: Simon Glass sjg@chromium.org --- Changes in v9: - Rebase to master
Changes in v8: None Changes in v7: None Changes in v6: None Changes in v5: - Add offsets support for access to fdt that uses CONFIG_OF_SEPARATE
Changes in v4: None Changes in v3: None Changes in v2: None
README | 7 +++++++ common/board_f.c | 14 ++++++++++++++ 2 files changed, 21 insertions(+)
diff --git a/README b/README index 2c36e00..a106aaf 100644 --- a/README +++ b/README @@ -3221,6 +3221,13 @@ Configuration Settings: its config.mk file). If you find problems enabling this option on your board please report the problem and send patches!
+- CONFIG_SYS_SYM_OFFSETS + This is set by architectures that use offsets for link symbols + instead of absolute values. So bss_start is obtained using an + offset _bss_start_ofs from CONFIG_SYS_TEXT_BASE, rather than + directly. You should not need to touch this setting. + + The following definitions that deal with the placement and management of environment data (variable area); in general, we support the following configurations: diff --git a/common/board_f.c b/common/board_f.c index 42042cc..b625ccb 100644 --- a/common/board_f.c +++ b/common/board_f.c @@ -107,8 +107,13 @@ static int display_text_info(void) { ulong bss_start, bss_end;
+#ifdef CONFIG_SYS_SYM_OFFSETS bss_start = _bss_start_ofs + _TEXT_BASE; bss_end = _bss_end_ofs + _TEXT_BASE; +#else + bss_start = (ulong)&__bss_start; + bss_end = (ulong)&__bss_end; +#endif debug("U-Boot code: %08X -> %08lX BSS: -> %08lX\n", CONFIG_SYS_TEXT_BASE, bss_start, bss_end);
@@ -174,7 +179,11 @@ static int zero_global_data(void)
static int setup_mon_len(void) { +#ifdef CONFIG_SYS_SYM_OFFSETS gd->mon_len = _bss_end_ofs; +#else + gd->mon_len = (ulong)&__bss_end - (ulong)&__text_start; +#endif return 0; }
@@ -190,7 +199,11 @@ static int setup_fdt(void) gd->fdt_blob = _binary_dt_dtb_start; #elif defined CONFIG_OF_SEPARATE /* FDT is at end of image */ +# ifdef CONFIG_SYS_SYM_OFFSETS gd->fdt_blob = (void *)(_end_ofs + CONFIG_SYS_TEXT_BASE); +# else + gd->fdt_blob = (ulong *)&_end; +# endif #endif /* Allow the early environment to override the fdt address */ gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, @@ -483,6 +496,7 @@ static int mark_bootstage(void) }
static init_fnc_t init_sequence_f[] = { + zero_global_data, setup_fdt, setup_mon_len, arch_cpu_init, /* basic arch cpu dependent setup */