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Commit 9fedd3f8 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Michael Ellerman
Browse files

powerpc/powernv: Add XICS emulation APIs 



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: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: default avatarStewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent c0691f9d

arch/powerpc/include/asm/opal-api.h

+5 −1
Original line number Diff line number Diff line
@@ -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 */

arch/powerpc/include/asm/opal.h

+5 −0
Original line number Diff line number Diff line
@@ -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);

arch/powerpc/platforms/powernv/opal-wrappers.S

+4 −0
Original line number Diff line number Diff line
@@ -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);