This patch adds the CONFIG_SKIP_LOWLEVEL_INIT option to start.S. This enables support for boards where the lowlevel initialization is already done when U-Boot runs (e.g. via OnChip ROM).
This will be used in the upcoming VCTH board support.
Signed-off-by: Stefan Roese sr@denx.de --- cpu/mips/start.S | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/cpu/mips/start.S b/cpu/mips/start.S index 0a69109..57db589 100644 --- a/cpu/mips/start.S +++ b/cpu/mips/start.S @@ -243,9 +243,11 @@ reset: mtc0 zero, CP0_COUNT mtc0 zero, CP0_COMPARE
+#if !defined(CONFIG_SKIP_LOWLEVEL_INIT) /* CONFIG0 register */ li t0, CONF_CM_UNCACHED mtc0 t0, CP0_CONFIG +#endif /* !CONFIG_SKIP_LOWLEVEL_INIT */
/* Initialize $gp. */ @@ -255,6 +257,7 @@ reset: 1: lw gp, 0(ra)
+#if !defined(CONFIG_SKIP_LOWLEVEL_INIT) /* Initialize any external memory. */ la t9, lowlevel_init @@ -271,6 +274,7 @@ reset: */ li t0, CONF_CM_CACHABLE_NONCOHERENT mtc0 t0, CP0_CONFIG +#endif /* !CONFIG_SKIP_LOWLEVEL_INIT */
/* Set up temporary stack. */