diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2014-07-24 17:14:42 +0400 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-07-25 16:12:15 +0400 |
| commit | 72c5839515260dce966cd24f54436e6583288e6c (patch) | |
| tree | f6a65a5899490397eaa8c6a609452d365f05273d /drivers/irqchip | |
| parent | ecb3c2bbf233d0c8d6e48009afa52c45c0204857 (diff) | |
| download | linux-72c5839515260dce966cd24f54436e6583288e6c.tar.xz | |
arm64: gicv3: Allow GICv3 compilation with older binutils
GICv3 introduces new system registers accessible with the full msr/mrs
syntax (e.g. mrs x0, Sop0_op1_CRm_CRn_op2). However, only recent
binutils understand the new syntax. This patch introduces msr_s/mrs_s
assembly macros which generate the equivalent instructions above and
converts the existing GICv3 code (both drivers/irqchip/ and
arch/arm64/kernel/).
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Olof Johansson <olof@lixom.net>
Tested-by: Olof Johansson <olof@lixom.net>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 81519bae0453..57eaa5a0b1e3 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -108,39 +108,39 @@ static u64 gic_read_iar(void) { u64 irqstat; - asm volatile("mrs %0, " __stringify(ICC_IAR1_EL1) : "=r" (irqstat)); + asm volatile("mrs_s %0, " __stringify(ICC_IAR1_EL1) : "=r" (irqstat)); return irqstat; } static void gic_write_pmr(u64 val) { - asm volatile("msr " __stringify(ICC_PMR_EL1) ", %0" : : "r" (val)); + asm volatile("msr_s " __stringify(ICC_PMR_EL1) ", %0" : : "r" (val)); } static void gic_write_ctlr(u64 val) { - asm volatile("msr " __stringify(ICC_CTLR_EL1) ", %0" : : "r" (val)); + asm volatile("msr_s " __stringify(ICC_CTLR_EL1) ", %0" : : "r" (val)); isb(); } static void gic_write_grpen1(u64 val) { - asm volatile("msr " __stringify(ICC_GRPEN1_EL1) ", %0" : : "r" (val)); + asm volatile("msr_s " __stringify(ICC_GRPEN1_EL1) ", %0" : : "r" (val)); isb(); } static void gic_write_sgi1r(u64 val) { - asm volatile("msr " __stringify(ICC_SGI1R_EL1) ", %0" : : "r" (val)); + asm volatile("msr_s " __stringify(ICC_SGI1R_EL1) ", %0" : : "r" (val)); } static void gic_enable_sre(void) { u64 val; - asm volatile("mrs %0, " __stringify(ICC_SRE_EL1) : "=r" (val)); + asm volatile("mrs_s %0, " __stringify(ICC_SRE_EL1) : "=r" (val)); val |= ICC_SRE_EL1_SRE; - asm volatile("msr " __stringify(ICC_SRE_EL1) ", %0" : : "r" (val)); + asm volatile("msr_s " __stringify(ICC_SRE_EL1) ", %0" : : "r" (val)); isb(); /* @@ -150,7 +150,7 @@ static void gic_enable_sre(void) * * Kindly inform the luser. */ - asm volatile("mrs %0, " __stringify(ICC_SRE_EL1) : "=r" (val)); + asm volatile("mrs_s %0, " __stringify(ICC_SRE_EL1) : "=r" (val)); if (!(val & ICC_SRE_EL1_SRE)) pr_err("GIC: unable to set SRE (disabled at EL2), panic ahead\n"); } |