Mike,
On Thursday 08 December 2011 05:44 AM, Mike Frysinger wrote:
On Tuesday 06 December 2011 18:00:19 Tom Warren wrote:
commit 0d479b53 (Aneesh V) added code for OMAP4 that doesn't
execute on Tegra, due to the AVP (ARM7TDI) not having a CP15.
Result was an undefined instruction hang just after reset.
--- a/arch/arm/cpu/armv7/start.S
+++ b/arch/arm/cpu/armv7/start.S
+#if !defined(CONFIG_TEGRA2)
/*
* Setup vector:
* (OMAP4 spl TEXT_BASE is not 32 byte aligned.
@@ -159,6 +160,7 @@ reset:
ldr r0, =_start
mcr p15, 0, r0, c12, c0, 0 @Set VBAR
#endif
+#endif /* !Tegra2 */
forgive my ignorance, but would it be better to invert the logic ? have ARM
cores that do have a CP15 define CONFIG_ARM_CP15 (or whatever) and then put all
this logic behind that rather than grow a list of SoC's that lack it ?
-mike
As far as I understand CP15 is typically available(if not mandatory) on
all armv7 processors. Here, IIUC, NVidia has a peculiar architecture
that necessitates an armv4 processor supported by armv7 code. IMHO,
this is the exceptional case.
br,
Aneesh
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