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powerpc/powernv: Add XICS emulation APIs

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OPAL provides an emulated XICS interrupt controller to
use as a fallback on newer processors that don't have a
XICS. It's meant as a way to provide backward compatibility
with future processors. Add the corresponding interfaces.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Benjamin Herrenschmidt 2016-07-08 16:37:05 +10:00 committed by Michael Ellerman
parent c0691f9dd2
commit 9fedd3f880
3 changed files with 14 additions and 1 deletions
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6
arch/powerpc/include/asm/opal-api.h
View File

@ -162,7 +162,11 @@
#define OPAL_PCI_GET_PRESENCE_STATE 119
#define OPAL_PCI_GET_POWER_STATE 120
#define OPAL_PCI_SET_POWER_STATE 121
#define OPAL_LAST 121
#define OPAL_INT_GET_XIRR 122
#define OPAL_INT_SET_CPPR 123
#define OPAL_INT_EOI 124
#define OPAL_INT_SET_MFRR 125
#define OPAL_LAST 125
/* Device tree flags */

5
arch/powerpc/include/asm/opal.h
View File

@ -218,6 +218,11 @@ int64_t opal_pci_set_power_state(uint64_t async_token, uint64_t id,
uint64_t data);
int64_t opal_pci_poll2(uint64_t id, uint64_t data);
int64_t opal_int_get_xirr(uint32_t *out_xirr, bool just_poll);
int64_t opal_int_set_cppr(uint8_t cppr);
int64_t opal_int_eoi(uint32_t xirr);
int64_t opal_int_set_mfrr(uint32_t cpu, uint8_t mfrr);
/* Internal functions */
extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
int depth, void *data);

4
arch/powerpc/platforms/powernv/opal-wrappers.S
View File

@ -307,3 +307,7 @@ OPAL_CALL(opal_get_device_tree, OPAL_GET_DEVICE_TREE);
OPAL_CALL(opal_pci_get_presence_state, OPAL_PCI_GET_PRESENCE_STATE);
OPAL_CALL(opal_pci_get_power_state, OPAL_PCI_GET_POWER_STATE);
OPAL_CALL(opal_pci_set_power_state, OPAL_PCI_SET_POWER_STATE);
OPAL_CALL(opal_int_get_xirr, OPAL_INT_GET_XIRR);
OPAL_CALL(opal_int_set_cppr, OPAL_INT_SET_CPPR);
OPAL_CALL(opal_int_eoi, OPAL_INT_EOI);
OPAL_CALL(opal_int_set_mfrr, OPAL_INT_SET_MFRR);