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Commit 2d81d425 authored by Shanker Donthineni's avatar Shanker Donthineni Committed by Marc Zyngier
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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: default avatarShanker Donthineni <shankerd@codeaurora.org>
[Marc: Folded its_write_baser_cache into its_write_baser]
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 9c8edddf

drivers/irqchip/irq-gic-v3-its.c

+20 −4
Original line number Diff line number Diff line
@@ -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 @@ static int its_alloc_tables(const char *node_name, struct its_node *its) 
		}



		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) {

			/*