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Merge branch 'for-next' of git://git.pengutronix.de/git/ukl/linux into devel-stable

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Conflicts:
	arch/arm/include/asm/cputype.h

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2013-03-09 15:49:32 +00:00
commit 73a09d212e
13 changed files with 130 additions and 55 deletions
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3
arch/arm/Kconfig
View File

@ -1684,8 +1684,9 @@ config SCHED_HRTICK
def_bool HIGH_RES_TIMERS
config THUMB2_KERNEL
bool "Compile the kernel in Thumb-2 mode"
bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
depends on CPU_V7 && !CPU_V6 && !CPU_V6K
default y if CPU_THUMBONLY
select AEABI
select ARM_ASM_UNIFIED
select ARM_UNWIND

16
arch/arm/include/asm/cp15.h
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@ -42,6 +42,8 @@
#define vectors_high() (0)
#endif
#ifdef CONFIG_CPU_CP15
extern unsigned long cr_no_alignment; /* defined in entry-armv.S */
extern unsigned long cr_alignment; /* defined in entry-armv.S */
@ -82,6 +84,18 @@ static inline void set_copro_access(unsigned int val)
isb();
}
#endif
#else /* ifdef CONFIG_CPU_CP15 */
/*
* cr_alignment and cr_no_alignment are tightly coupled to cp15 (at least in the
* minds of the developers). Yielding 0 for machines without a cp15 (and making
* it read-only) is fine for most cases and saves quite some #ifdeffery.
*/
#define cr_no_alignment UL(0)
#define cr_alignment UL(0)
#endif /* ifdef CONFIG_CPU_CP15 / else */
#endif /* ifndef __ASSEMBLY__ */
#endif

75
arch/arm/include/asm/cputype.h
View File

@ -38,32 +38,6 @@
#define MPIDR_AFFINITY_LEVEL(mpidr, level) \
((mpidr >> (MPIDR_LEVEL_BITS * level)) & MPIDR_LEVEL_MASK)
extern unsigned int processor_id;
#ifdef CONFIG_CPU_CP15
#define read_cpuid(reg) \
({ \
unsigned int __val; \
asm("mrc p15, 0, %0, c0, c0, " __stringify(reg) \
: "=r" (__val) \
: \
: "cc"); \
__val; \
})
#define read_cpuid_ext(ext_reg) \
({ \
unsigned int __val; \
asm("mrc p15, 0, %0, c0, " ext_reg \
: "=r" (__val) \
: \
: "cc"); \
__val; \
})
#else
#define read_cpuid(reg) (processor_id)
#define read_cpuid_ext(reg) 0
#endif
#define ARM_CPU_IMP_ARM 0x41
#define ARM_CPU_IMP_INTEL 0x69
@ -82,6 +56,46 @@ extern unsigned int processor_id;
#define ARM_CPU_XSCALE_ARCH_V2 0x4000
#define ARM_CPU_XSCALE_ARCH_V3 0x6000
extern unsigned int processor_id;
#ifdef CONFIG_CPU_CP15
#define read_cpuid(reg) \
({ \
unsigned int __val; \
asm("mrc p15, 0, %0, c0, c0, " __stringify(reg) \
: "=r" (__val) \
: \
: "cc"); \
__val; \
})
#define read_cpuid_ext(ext_reg) \
({ \
unsigned int __val; \
asm("mrc p15, 0, %0, c0, " ext_reg \
: "=r" (__val) \
: \
: "cc"); \
__val; \
})
#else /* ifdef CONFIG_CPU_CP15 */
/*
* read_cpuid and read_cpuid_ext should only ever be called on machines that
* have cp15 so warn on other usages.
*/
#define read_cpuid(reg) \
({ \
WARN_ON_ONCE(1); \
0; \
})
#define read_cpuid_ext(reg) read_cpuid(reg)
#endif /* ifdef CONFIG_CPU_CP15 / else */
#ifdef CONFIG_CPU_CP15
/*
* The CPU ID never changes at run time, so we might as well tell the
* compiler that it's constant. Use this function to read the CPU ID
@ -92,6 +106,15 @@ static inline unsigned int __attribute_const__ read_cpuid_id(void)
return read_cpuid(CPUID_ID);
}
#else /* ifdef CONFIG_CPU_CP15 */
static inline unsigned int __attribute_const__ read_cpuid_id(void)
{
return processor_id;
}
#endif /* ifdef CONFIG_CPU_CP15 / else */
static inline unsigned int __attribute_const__ read_cpuid_implementor(void)
{
return (read_cpuid_id() & 0xFF000000) >> 24;

36
arch/arm/include/asm/glue-df.h
View File

@ -18,12 +18,12 @@
* ================
*
* We have the following to choose from:
* arm6 - ARM6 style
* arm7 - ARM7 style
* v4_early - ARMv4 without Thumb early abort handler
* v4t_late - ARMv4 with Thumb late abort handler
* v4t_early - ARMv4 with Thumb early abort handler
* v5tej_early - ARMv5 with Thumb and Java early abort handler
* v5t_early - ARMv5 with Thumb early abort handler
* v5tj_early - ARMv5 with Thumb and Java early abort handler
* xscale - ARMv5 with Thumb with Xscale extensions
* v6_early - ARMv6 generic early abort handler
* v7_early - ARMv7 generic early abort handler
@ -39,14 +39,6 @@
# endif
#endif
#ifdef CONFIG_CPU_ABRT_LV4T
# ifdef CPU_DABORT_HANDLER
# define MULTI_DABORT 1
# else
# define CPU_DABORT_HANDLER v4t_late_abort
# endif
#endif
#ifdef CONFIG_CPU_ABRT_EV4
# ifdef CPU_DABORT_HANDLER
# define MULTI_DABORT 1
@ -55,6 +47,14 @@
# endif
#endif
#ifdef CONFIG_CPU_ABRT_LV4T
# ifdef CPU_DABORT_HANDLER
# define MULTI_DABORT 1
# else
# define CPU_DABORT_HANDLER v4t_late_abort
# endif
#endif
#ifdef CONFIG_CPU_ABRT_EV4T
# ifdef CPU_DABORT_HANDLER
# define MULTI_DABORT 1
@ -63,14 +63,6 @@
# endif
#endif
#ifdef CONFIG_CPU_ABRT_EV5TJ
# ifdef CPU_DABORT_HANDLER
# define MULTI_DABORT 1
# else
# define CPU_DABORT_HANDLER v5tj_early_abort
# endif
#endif
#ifdef CONFIG_CPU_ABRT_EV5T
# ifdef CPU_DABORT_HANDLER
# define MULTI_DABORT 1
@ -79,6 +71,14 @@
# endif
#endif
#ifdef CONFIG_CPU_ABRT_EV5TJ
# ifdef CPU_DABORT_HANDLER
# define MULTI_DABORT 1
# else
# define CPU_DABORT_HANDLER v5tj_early_abort
# endif
#endif
#ifdef CONFIG_CPU_ABRT_EV6
# ifdef CPU_DABORT_HANDLER
# define MULTI_DABORT 1

9
arch/arm/kernel/head-common.S
View File

@ -98,8 +98,9 @@ __mmap_switched:
str r9, [r4] @ Save processor ID
str r1, [r5] @ Save machine type
str r2, [r6] @ Save atags pointer
bic r4, r0, #CR_A @ Clear 'A' bit
stmia r7, {r0, r4} @ Save control register values
cmp r7, #0
bicne r4, r0, #CR_A @ Clear 'A' bit
stmneia r7, {r0, r4} @ Save control register values
b start_kernel
ENDPROC(__mmap_switched)
@ -113,7 +114,11 @@ __mmap_switched_data:
.long processor_id @ r4
.long __machine_arch_type @ r5
.long __atags_pointer @ r6
#ifdef CONFIG_CPU_CP15
.long cr_alignment @ r7
#else
.long 0 @ r7
#endif
.long init_thread_union + THREAD_START_SP @ sp
.size __mmap_switched_data, . - __mmap_switched_data

8
arch/arm/kernel/head-nommu.S
View File

@ -32,15 +32,21 @@
* numbers for r1.
*
*/
.arm
__HEAD
#ifdef CONFIG_CPU_THUMBONLY
.thumb
ENTRY(stext)
#else
.arm
ENTRY(stext)
THUMB( adr r9, BSYM(1f) ) @ Kernel is always entered in ARM.
THUMB( bx r9 ) @ If this is a Thumb-2 kernel,
THUMB( .thumb ) @ switch to Thumb now.
THUMB(1: )
#endif
setmode PSR_F_BIT | PSR_I_BIT | SVC_MODE, r9 @ ensure svc mode
@ and irqs disabled

2
arch/arm/kernel/setup.c
View File

@ -291,10 +291,10 @@ static int cpu_has_aliasing_icache(unsigned int arch)
static void __init cacheid_init(void)
{
unsigned int cachetype = read_cpuid_cachetype();
unsigned int arch = cpu_architecture();
if (arch >= CPU_ARCH_ARMv6) {
unsigned int cachetype = read_cpuid_cachetype();
if ((cachetype & (7 << 29)) == 4 << 29) {
/* ARMv7 register format */
arch = CPU_ARCH_ARMv7;

2
arch/arm/kernel/smp_scu.c
View File

@ -41,7 +41,7 @@ void scu_enable(void __iomem *scu_base)
#ifdef CONFIG_ARM_ERRATA_764369
/* Cortex-A9 only */
if ((read_cpuid(CPUID_ID) & 0xff0ffff0) == 0x410fc090) {
if ((read_cpuid_id() & 0xff0ffff0) == 0x410fc090) {
scu_ctrl = __raw_readl(scu_base + 0x30);
if (!(scu_ctrl & 1))
__raw_writel(scu_ctrl | 0x1, scu_base + 0x30);

4
arch/arm/mach-omap2/id.c
View File

@ -300,7 +300,7 @@ void __init omap3xxx_check_revision(void)
* If the processor type is Cortex-A8 and the revision is 0x0
* it means its Cortex r0p0 which is 3430 ES1.0.
*/
cpuid = read_cpuid(CPUID_ID);
cpuid = read_cpuid_id();
if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
omap_revision = OMAP3430_REV_ES1_0;
cpu_rev = "1.0";
@ -460,7 +460,7 @@ void __init omap4xxx_check_revision(void)
* Use ARM register to detect the correct ES version
*/
if (!rev && (hawkeye != 0xb94e) && (hawkeye != 0xb975)) {
idcode = read_cpuid(CPUID_ID);
idcode = read_cpuid_id();
rev = (idcode & 0xf) - 1;
}

2
arch/arm/mach-omap2/omap-smp.c
View File

@ -209,7 +209,7 @@ static void __init omap4_smp_init_cpus(void)
unsigned int i = 0, ncores = 1, cpu_id;
/* Use ARM cpuid check here, as SoC detection will not work so early */
cpu_id = read_cpuid(CPUID_ID) & CPU_MASK;
cpu_id = read_cpuid_id() & CPU_MASK;
if (cpu_id == CPU_CORTEX_A9) {
/*
* Currently we can't call ioremap here because

9
arch/arm/mm/Kconfig
View File

@ -397,6 +397,13 @@ config CPU_V7
select CPU_PABRT_V7
select CPU_TLB_V7 if MMU
config CPU_THUMBONLY
bool
# There are no CPUs available with MMU that don't implement an ARM ISA:
depends on !MMU
help
Select this if your CPU doesn't support the 32 bit ARM instructions.
# Figure out what processor architecture version we should be using.
# This defines the compiler instruction set which depends on the machine type.
config CPU_32v3
@ -608,7 +615,7 @@ config ARCH_DMA_ADDR_T_64BIT
bool
config ARM_THUMB
bool "Support Thumb user binaries"
bool "Support Thumb user binaries" if !CPU_THUMBONLY
depends on CPU_ARM720T || CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_V6 || CPU_V6K || CPU_V7 || CPU_FEROCEON
default y
help

2
arch/arm/mm/alignment.c
View File

@ -961,12 +961,14 @@ static int __init alignment_init(void)
return -ENOMEM;
#endif
#ifdef CONFIG_CPU_CP15
if (cpu_is_v6_unaligned()) {
cr_alignment &= ~CR_A;
cr_no_alignment &= ~CR_A;
set_cr(cr_alignment);
ai_usermode = safe_usermode(ai_usermode, false);
}
#endif
hook_fault_code(FAULT_CODE_ALIGNMENT, do_alignment, SIGBUS, BUS_ADRALN,
"alignment exception");

17
arch/arm/mm/mmu.c
View File

@ -112,6 +112,7 @@ static struct cachepolicy cache_policies[] __initdata = {
}
};
#ifdef CONFIG_CPU_CP15
/*
* These are useful for identifying cache coherency
* problems by allowing the cache or the cache and
@ -210,6 +211,22 @@ void adjust_cr(unsigned long mask, unsigned long set)
}
#endif
#else /* ifdef CONFIG_CPU_CP15 */
static int __init early_cachepolicy(char *p)
{
pr_warning("cachepolicy kernel parameter not supported without cp15\n");
}
early_param("cachepolicy", early_cachepolicy);
static int __init noalign_setup(char *__unused)
{
pr_warning("noalign kernel parameter not supported without cp15\n");
}
__setup("noalign", noalign_setup);
#endif /* ifdef CONFIG_CPU_CP15 / else */
#define PROT_PTE_DEVICE L_PTE_PRESENT|L_PTE_YOUNG|L_PTE_DIRTY|L_PTE_XN
#define PROT_SECT_DEVICE PMD_TYPE_SECT|PMD_SECT_AP_WRITE