diff options
| author | Shanker Donthineni <shankerd@codeaurora.org> | 2016-06-06 23:17:28 (GMT) |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-06-13 10:53:52 (GMT) |
| commit | 2d81d425b6d5cc2262912cce9f9ec7f706a3ea65 (patch) | |
| tree | 36afdb7faa50c33825736c066dae5f118ea0cce8 /drivers/irqchip/irq-gic-v3-its.c | |
| parent | 9c8edddfc9924cb473a7570c37ca466db70728f8 (diff) | |
| download | linux-2d81d425b6d5cc2262912cce9f9ec7f706a3ea65.tar.xz | |
irqchip/gicv3-its: Introduce two helper functions for accessing BASERn
This patch adds the two handy helper functions for reading and writing
ITS BASERn register.
Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
[Marc: Folded its_write_baser_cache into its_write_baser]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip/irq-gic-v3-its.c')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3-its.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 5eb1f9e..a8a1144 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -824,6 +824,22 @@ static const char *its_base_type_string[] = { [GITS_BASER_TYPE_RESERVED7] = "Reserved (7)", }; +static u64 its_read_baser(struct its_node *its, struct its_baser *baser) +{ + u32 idx = baser - its->tables; + + return readq_relaxed(its->base + GITS_BASER + (idx << 3)); +} + +static void its_write_baser(struct its_node *its, struct its_baser *baser, + u64 val) +{ + u32 idx = baser - its->tables; + + writeq_relaxed(val, its->base + GITS_BASER + (idx << 3)); + baser->val = its_read_baser(its, baser); +} + static void its_free_tables(struct its_node *its) { int i; @@ -863,7 +879,8 @@ static int its_alloc_tables(const char *node_name, struct its_node *its) its->device_ids = ids; for (i = 0; i < GITS_BASER_NR_REGS; i++) { - u64 val = readq_relaxed(its->base + GITS_BASER + i * 8); + struct its_baser *baser = its->tables + i; + u64 val = its_read_baser(its, baser); u64 type = GITS_BASER_TYPE(val); u64 entry_size = GITS_BASER_ENTRY_SIZE(val); int order = get_order(psz); @@ -937,10 +954,9 @@ retry_baser: } val |= alloc_pages - 1; - its->tables[i].val = val; - writeq_relaxed(val, its->base + GITS_BASER + i * 8); - tmp = readq_relaxed(its->base + GITS_BASER + i * 8); + its_write_baser_cache(its, baser, val); + tmp = baser->val; if ((val ^ tmp) & GITS_BASER_SHAREABILITY_MASK) { /* |