Add helper routines to parse and set up BASER registers.
Add a new test dedicated to BASER<n> accesses.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
v2 -> v3:
- remove everything related to memory attributes
- s/dev_baser/coll_baser/ in report_info
- add extra line
- removed index filed in its_baser
---
arm/gic.c | 21 ++++++++++-
arm/unittests.cfg | 6 +++
lib/arm/asm/gic-v3-its.h | 14 +++++++
lib/arm/gic-v3-its.c | 80 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 120 insertions(+), 1 deletion(-)
diff --git a/arm/gic.c b/arm/gic.c
index adeb981..3597ac3 100644
--- a/arm/gic.c
+++ b/arm/gic.c
@@ -531,11 +531,26 @@ static void test_its_introspection(void)
typer->collid_bits);
report(typer->eventid_bits && typer->deviceid_bits &&
typer->collid_bits, "ID spaces");
- report(!typer->hw_collections, "collections only in ext memory");
report_info("Target address format %s",
typer->pta ? "Redist basse address" : "PE #");
}
+static void test_its_baser(void)
+{
+ struct its_baser *dev_baser, *coll_baser;
+
+ if (!gicv3_its_base()) {
+ report_skip("No ITS, skip ...");
+ return;
+ }
+
+ dev_baser = its_lookup_baser(GITS_BASER_TYPE_DEVICE);
+ coll_baser = its_lookup_baser(GITS_BASER_TYPE_COLLECTION);
+ report(dev_baser && coll_baser, "detect device and collection BASER");
+ report_info("device baser entry_size = 0x%x", dev_baser->esz);
+ report_info("collection baser entry_size = 0x%x", coll_baser->esz);
+}
+
int main(int argc, char **argv)
{
if (!gic_init()) {
@@ -571,6 +586,10 @@ int main(int argc, char **argv)
report_prefix_push(argv[1]);
test_its_introspection();
report_prefix_pop();
+ } else if (strcmp(argv[1], "its-baser") == 0) {
+ report_prefix_push(argv[1]);
+ test_its_baser();
+ report_prefix_pop();
} else {
report_abort("Unknown subtest '%s'", argv[1]);
}
diff --git a/arm/unittests.cfg b/arm/unittests.cfg
index bd20460..2234a0f 100644
--- a/arm/unittests.cfg
+++ b/arm/unittests.cfg
@@ -128,6 +128,12 @@ smp = $MAX_SMP
extra_params = -machine gic-version=3 -append 'its-introspection'
groups = its
+[its-baser]
+file = gic.flat
+smp = $MAX_SMP
+extra_params = -machine gic-version=3 -append 'its-baser'
+groups = its
+
# Test PSCI emulation
[psci]
file = psci.flat
diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h
index 8816d57..5a4dfe9 100644
--- a/lib/arm/asm/gic-v3-its.h
+++ b/lib/arm/asm/gic-v3-its.h
@@ -65,9 +65,20 @@ struct its_typer {
bool virt_lpi;
};
+struct its_baser {
+ int type;
+ size_t psz;
+ int nr_pages;
+ bool indirect;
+ phys_addr_t table_addr;
+ bool valid;
+ int esz;
+};
+
struct its_data {
void *base;
struct its_typer typer;
+ struct its_baser baser[GITS_BASER_NR_REGS];
};
extern struct its_data its_data;
@@ -76,6 +87,9 @@ extern struct its_data its_data;
extern void its_parse_typer(void);
extern void its_init(void);
+extern int its_parse_baser(int i, struct its_baser *baser);
+extern void its_setup_baser(int i, struct its_baser *baser);
+extern struct its_baser *its_lookup_baser(int type);
#endif /* !__ASSEMBLY__ */
#endif /* _ASMARM_GIC_V3_ITS_H_ */
diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c
index ce607bb..79946c3 100644
--- a/lib/arm/gic-v3-its.c
+++ b/lib/arm/gic-v3-its.c
@@ -4,6 +4,7 @@
* This work is licensed under the terms of the GNU LGPL, version 2.
*/
#include <asm/gic.h>
+#include <alloc_page.h>
struct its_data its_data;
@@ -29,11 +30,90 @@ void its_parse_typer(void)
its_data.typer.phys_lpi = typer & GITS_TYPER_PLPIS;
}
+int its_parse_baser(int i, struct its_baser *baser)
+{
+ void *reg_addr = gicv3_its_base() + GITS_BASER + i * 8;
+ u64 val = readq(reg_addr);
+
+ if (!val) {
+ memset(baser, 0, sizeof(*baser));
+ return -1;
+ }
+
+ baser->valid = val & GITS_BASER_VALID;
+ baser->indirect = val & GITS_BASER_INDIRECT;
+ baser->type = GITS_BASER_TYPE(val);
+ baser->esz = GITS_BASER_ENTRY_SIZE(val);
+ baser->nr_pages = GITS_BASER_NR_PAGES(val);
+ baser->table_addr = val & GITS_BASER_PHYS_ADDR_MASK;
+ switch (val & GITS_BASER_PAGE_SIZE_MASK) {
+ case GITS_BASER_PAGE_SIZE_4K:
+ baser->psz = SZ_4K;
+ break;
+ case GITS_BASER_PAGE_SIZE_16K:
+ baser->psz = SZ_16K;
+ break;
+ case GITS_BASER_PAGE_SIZE_64K:
+ baser->psz = SZ_64K;
+ break;
+ default:
+ baser->psz = SZ_64K;
+ }
+ return 0;
+}
+
+struct its_baser *its_lookup_baser(int type)
+{
+ int i;
+
+ for (i = 0; i < GITS_BASER_NR_REGS; i++) {
+ struct its_baser *baser = &its_data.baser[i];
+
+ if (baser->type == type)
+ return baser;
+ }
+ return NULL;
+}
+
void its_init(void)
{
+ int i;
+
if (!its_data.base)
return;
its_parse_typer();
+ for (i = 0; i < GITS_BASER_NR_REGS; i++)
+ its_parse_baser(i, &its_data.baser[i]);
+}
+
+void its_setup_baser(int i, struct its_baser *baser)
+{
+ unsigned long n = (baser->nr_pages * baser->psz) >> PAGE_SHIFT;
+ unsigned long order = is_power_of_2(n) ? fls(n) : fls(n) + 1;
+ u64 val;
+
+ baser->table_addr = (u64)virt_to_phys(alloc_pages(order));
+
+ val = ((u64)baser->table_addr |
+ ((u64)baser->type << GITS_BASER_TYPE_SHIFT) |
+ ((u64)(baser->esz - 1) << GITS_BASER_ENTRY_SIZE_SHIFT) |
+ ((baser->nr_pages - 1) << GITS_BASER_PAGES_SHIFT) |
+ (u64)baser->indirect << 62 |
+ (u64)baser->valid << 63);
+
+ switch (baser->psz) {
+ case SZ_4K:
+ val |= GITS_BASER_PAGE_SIZE_4K;
+ break;
+ case SZ_16K:
+ val |= GITS_BASER_PAGE_SIZE_16K;
+ break;
+ case SZ_64K:
+ val |= GITS_BASER_PAGE_SIZE_64K;
+ break;
+ }
+
+ writeq(val, gicv3_its_base() + GITS_BASER + i * 8);
}
--
2.20.1
