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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-01-12 17:50:42 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-02-15 16:36:44 +0000
commit6fc31d54443bdc25a8166be15e3920a7e39d195d (patch)
tree70ae632dec09e31e7db475de53ee620c2bf1c183 /arch/arm/kernel/head.S
parentebf53826e105f488f4f628703a108e98940d1dc5 (diff)
ARM: Defer lookup of machine_type to setup.c
Since the debug macros no longer depend on the machine type information, the machine type lookup can be deferred to setup_arch() in setup.c which simplifies the code somewhat. We also move the __error_a functionality into setup.c for displaying a message when a bad machine ID is passed to the kernel via the LL debug code. We also log this into the kernel ring buffer which makes it possible to retrieve the message via a debugger. Original idea from Grant Likely. Acked-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/head.S')
-rw-r--r--arch/arm/kernel/head.S9
1 files changed, 2 insertions, 7 deletions
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index c0225da3fb21..8a154b940fef 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -87,14 +87,10 @@ ENTRY(stext)
movs r10, r5 @ invalid processor (r5=0)?
THUMB( it eq ) @ force fixup-able long branch encoding
beq __error_p @ yes, error 'p'
- bl __lookup_machine_type @ r5=machinfo
- movs r8, r5 @ invalid machine (r5=0)?
- THUMB( it eq ) @ force fixup-able long branch encoding
- beq __error_a @ yes, error 'a'
/*
* r1 = machine no, r2 = atags,
- * r8 = machinfo, r9 = cpuid, r10 = procinfo
+ * r9 = cpuid, r10 = procinfo
*/
bl __vet_atags
#ifdef CONFIG_SMP_ON_UP
@@ -105,7 +101,7 @@ ENTRY(stext)
/*
* The following calls CPU specific code in a position independent
* manner. See arch/arm/mm/proc-*.S for details. r10 = base of
- * xxx_proc_info structure selected by __lookup_machine_type
+ * xxx_proc_info structure selected by __lookup_processor_type
* above. On return, the CPU will be ready for the MMU to be
* turned on, and r0 will hold the CPU control register value.
*/
@@ -124,7 +120,6 @@ ENDPROC(stext)
* amount which are required to get the kernel running, which
* generally means mapping in the kernel code.
*
- * r8 = machinfo
* r9 = cpuid
* r10 = procinfo
*