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authorPeter Maydell <peter.maydell@linaro.org>2022-04-08 15:15:31 +0100
committerPeter Maydell <peter.maydell@linaro.org>2022-04-22 14:44:52 +0100
commitae3b3ba15c73320f75c121b08266a25a9e5d4edb (patch)
tree1b247f393eee5c741a56072fae2f6c10196884e5 /hw/intc/gicv3_internal.h
parentc6dd2f9950cb59f7a02d57dcefef4d982efc6c7e (diff)
hw/intc/arm_gicv3: Implement GICv4's new redistributor frame
The GICv4 extends the redistributor register map -- where GICv3 had two 64KB frames per CPU, GICv4 has four frames. Add support for the extra frame by using a new gicv3_redist_size() function in the places in the GIC implementation which currently use a fixed constant size for the redistributor register block. (Until we implement the extra registers they will RAZ/WI.) Any board that wants to use a GICv4 will need to also adjust to handle the different sized redistributor register block; that will be done separately. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220408141550.1271295-23-peter.maydell@linaro.org
Diffstat (limited to 'hw/intc/gicv3_internal.h')
-rw-r--r--hw/intc/gicv3_internal.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/hw/intc/gicv3_internal.h b/hw/intc/gicv3_internal.h
index a46d1378a9..9fff1cd52a 100644
--- a/hw/intc/gicv3_internal.h
+++ b/hw/intc/gicv3_internal.h
@@ -490,6 +490,27 @@ FIELD(VTE, RDBASE, 42, RDBASE_PROCNUM_LENGTH)
/* Functions internal to the emulated GICv3 */
/**
+ * gicv3_redist_size:
+ * @s: GICv3State
+ *
+ * Return the size of the redistributor register frame in bytes
+ * (which depends on what GIC version this is)
+ */
+static inline int gicv3_redist_size(GICv3State *s)
+{
+ /*
+ * Redistributor size is controlled by the redistributor GICR_TYPER.VLPIS.
+ * It's the same for every redistributor in the GIC, so arbitrarily
+ * use the register field in the first one.
+ */
+ if (s->cpu[0].gicr_typer & GICR_TYPER_VLPIS) {
+ return GICV4_REDIST_SIZE;
+ } else {
+ return GICV3_REDIST_SIZE;
+ }
+}
+
+/**
* gicv3_intid_is_special:
* @intid: interrupt ID
*