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arch/tile: parameterize system PLs to support KVM port

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While not a port to KVM (yet), this change modifies the kernel
to be able to build either at PL1 or at PL2 with a suitable
config switch.  Pushing up this change avoids handling branch
merge issues going forward with the KVM work.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf
2010-10-14 16:23:03 -04:00
parent bf65e440e8
commit a78c942df6
23 changed files with 337 additions and 131 deletions
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16
arch/tile/kernel/irq.c
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@@ -61,9 +61,9 @@ static DEFINE_SPINLOCK(available_irqs_lock);
#if CHIP_HAS_IPI()
/* Use SPRs to manipulate device interrupts. */
#define mask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_SET_1, irq_mask)
#define unmask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_RESET_1, irq_mask)
#define clear_irqs(irq_mask) __insn_mtspr(SPR_IPI_EVENT_RESET_1, irq_mask)
#define mask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_SET_K, irq_mask)
#define unmask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_RESET_K, irq_mask)
#define clear_irqs(irq_mask) __insn_mtspr(SPR_IPI_EVENT_RESET_K, irq_mask)
#else
/* Use HV to manipulate device interrupts. */
#define mask_irqs(irq_mask) hv_disable_intr(irq_mask)
@@ -89,16 +89,16 @@ void tile_dev_intr(struct pt_regs *regs, int intnum)
* masked by a previous interrupt. Then, mask out the ones
* we're going to handle.
*/
unsigned long masked = __insn_mfspr(SPR_IPI_MASK_1);
original_irqs = __insn_mfspr(SPR_IPI_EVENT_1) & ~masked;
__insn_mtspr(SPR_IPI_MASK_SET_1, original_irqs);
unsigned long masked = __insn_mfspr(SPR_IPI_MASK_K);
original_irqs = __insn_mfspr(SPR_IPI_EVENT_K) & ~masked;
__insn_mtspr(SPR_IPI_MASK_SET_K, original_irqs);
#else
/*
* Hypervisor performs the equivalent of the Gx code above and
* then puts the pending interrupt mask into a system save reg
* for us to find.
*/
original_irqs = __insn_mfspr(SPR_SYSTEM_SAVE_1_3);
original_irqs = __insn_mfspr(SPR_SYSTEM_SAVE_K_3);
#endif
remaining_irqs = original_irqs;
@@ -225,7 +225,7 @@ void __cpuinit setup_irq_regs(void)
/* Enable interrupt delivery. */
unmask_irqs(~0UL);
#if CHIP_HAS_IPI()
raw_local_irq_unmask(INT_IPI_1);
raw_local_irq_unmask(INT_IPI_K);
#endif
}