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2013-10-14 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>

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* arm/cpu-init/rdimon-aem.S: Disable for M class cores.
	* arm/crt0.S: Don't call _rdimon_hw_init_hook for non-A class cores.
	* arm/cpu-init/Makefile.in (CPU_INIT_OBJS): Use CFLAGS.
This commit is contained in:
Richard Earnshaw 2013-10-14 15:15:12 +00:00
parent 40ec00004b
commit 639951dda7
4 changed files with 33 additions and 8 deletions
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6
libgloss/ChangeLog
View File

@ -1,3 +1,9 @@
2013-10-14 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
* arm/cpu-init/rdimon-aem.S: Disable for M class cores.
* arm/crt0.S: Don't call _rdimon_hw_init_hook for non-A class cores.
* arm/cpu-init/Makefile.in (CPU_INIT_OBJS): Use CFLAGS.
2013-09-30 Steve Ellcey <sellcey@mips.com>
* mips/Makefile.in (install): Add mkdir, fix install command.

2
libgloss/arm/cpu-init/Makefile.in
View File

@ -60,7 +60,7 @@ test:
# Static pattern rule for assembling cpu init files to object files.
${CPU_INIT_OBJS}: %.o: %.S
$(CC) $(CFLAGS_FOR_TARGET) $(INCLUDES) -DARM_RDI_MONITOR -o $@ -c $<
$(CC) $(CFLAGS_FOR_TARGET) $(CFLAGS) $(INCLUDES) -DARM_RDI_MONITOR -o $@ -c $<
clean mostlyclean:
rm -f a.out core *.i *.o *-test *.srec *.dis *.x

26
libgloss/arm/cpu-init/rdimon-aem.S
View File

@ -37,18 +37,22 @@
It does not change processor state from the startup privilege and security
level.
This has only been tested to work in ARM state.
By default it assumes exception vectors are located from address 0.
However, if this is not true they can be moved by defining the
_rdimon_vector_base symbol. For example if you have HIVECS enabled you
may pass --defsym _rdimon_vector_base=0xffff0000 on the linker command
line. */
/* __ARM_ARCH_PROFILE is defined from GCC 4.8 onwards, however __ARM_ARCH_7A
has been defined since 4.2 onwards, which is when v7-a support was added
and hence 'A' profile support was added in the compiler. Allow for this
file to be built with older compilers. */
#if defined(__ARM_ARCH_7A__) || (__ARM_ARCH_PROFILE == 'A')
.syntax unified
.arch armv7-a
#if defined(__thumb__)
.thumb
#endif
.arm
@ CPU Initialisation
.globl _rdimon_hw_init_hook
@ -81,6 +85,7 @@ spin:
@ For Cortex-A15 and Cortex-A7 only:
@ Write zero into the ACTLR to turn everything on.
itt eq
moveq r4, #0
mcreq 15, 0, r4, c1, c0, 1
isb
@ -88,6 +93,7 @@ spin:
@ For Cortex-A15 and Cortex-A7 only:
@ Set ACTLR:SMP bit before enabling the caches and MMU,
@ or performing any cache and TLB maintenance operations.
ittt eq
mrceq 15, 0, r4, c1, c0, 1 @ Read ACTLR
orreq r4, r4, #(1<<6) @ Enable ACTLR:SMP
mcreq 15, 0, r4, c1, c0, 1 @ Write ACTLR
@ -245,7 +251,7 @@ vector_common_adr:
.word vector_common_2 @ Common handling code
@ Vector stack
.align 3 @ Align to 8 byte boundary boundary to
.p2align 3 @ Align to 8 byte boundary boundary to
@ keep ABI compatibility
.fill 32, 4, 0 @ 32-entry stack is enough for vector
@ handlers.
@ -365,7 +371,8 @@ register_names:
.asciz "r12 "
.asciz "r14 "
.align
.p2align 3
@ Enable the caches
__enable_caches:
@ -386,7 +393,7 @@ __enable_caches:
cmp r0, #0
it ne
orrne r4, r4, #4
mcr 15, 0, r4, cr1, cr0, 0 @ Eanble D-Cache
mcr 15, 0, r4, cr1, cr0, 0 @ Enable D-Cache
bx r5 @ Return
__reset_caches:
@ -414,7 +421,9 @@ __reset_caches:
orrne r1, r1, #0x1000 @ Enable I-Cache now -
@ We actually only do this if we have a
@ Harvard style cache.
it eq
bleq init_cpu_client_enable_dcache
itt eq
cmpeq r0, #0
beq Finished1
@ -483,6 +492,7 @@ is_a15_a7:
cmp r8, r9
movw r9, #0xc070
movt r9, #0x410f
it ne
cmpne r8, r9
bx lr
@ -516,3 +526,5 @@ is_a15_a7:
.p2align 14
page_tables:
PT7(0x1c0e)
#endif //#if defined(__ARM_ARCH_7A__) || __ARM_ARCH_PROFILE == 'A'

7
libgloss/arm/crt0.S
View File

@ -77,11 +77,18 @@
.fnstart
#endif
/* __ARM_ARCH_PROFILE is defined from GCC 4.8 onwards, however __ARM_ARCH_7A
has been defined since 4.2 onwards, which is when v7-a support was added
and hence 'A' profile support was added in the compiler. Allow for this
file to be built with older compilers. We only call this for A profile
cores. */
#if defined (__ARM_ARCH_7A__) || (__ARM_ARCH_PROFILE == 'A')
/* The init hook does not use the stack and is called before the stack has been set up. */
#ifdef ARM_RDI_MONITOR
bl _rdimon_hw_init_hook
.weak FUNCTION (_rdimon_hw_init_hook)
#endif
#endif
/* Start by setting up a stack */
#ifdef ARM_RDP_MONITOR