From f4b9523ba6388f6f951933de3f9a76e2e9ea2ede Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Tue, 7 Aug 2012 16:10:34 +0000 Subject: pseries: added allocator for a block of IRQs The patch adds a simple helper which allocates a consecutive sequence of IRQs calling spapr_allocate_irq for each and checks that allocated IRQs go consequently. The patch is required for upcoming support of MSI/MSIX on POWER. Signed-off-by: Alexey Kardashevskiy Signed-off-by: David Gibson Signed-off-by: Alexander Graf --- hw/spapr.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'hw/spapr.c') diff --git a/hw/spapr.c b/hw/spapr.c index 8153c05..afbdbc5 100644 --- a/hw/spapr.c +++ b/hw/spapr.c @@ -105,6 +105,32 @@ int spapr_allocate_irq(int hint, enum xics_irq_type type) return irq; } +/* Allocate block of consequtive IRQs, returns a number of the first */ +int spapr_allocate_irq_block(int num, enum xics_irq_type type) +{ + int first = -1; + int i; + + for (i = 0; i < num; ++i) { + int irq; + + irq = spapr_allocate_irq(0, type); + if (!irq) { + return -1; + } + + if (0 == i) { + first = irq; + } + + /* If the above doesn't create a consecutive block then that's + * an internal bug */ + assert(irq == (first + i)); + } + + return first; +} + static int spapr_set_associativity(void *fdt, sPAPREnvironment *spapr) { int ret = 0, offset; -- cgit v1.1