plat: marvell: ap807: implement workaround for errata-id 3033912
ERRATA ID: RES-3033912 - Internal Address Space Init state causes
a hang upon accesses to [0xf070_0000, 0xf07f_ffff]
Workaround: Boot Firmware (ATF) should configure CCU_RGF_WIN(4) to
split [0x6e_0000, 0xff_ffff] to values [0x6e_0000, 0x6f_ffff] and
[0x80_0000, 0xff_ffff] that cause accesses to the segment of
[0xf070_0000, 0xf07f_ffff] to act as RAZWI. Reuse common
work-around code for both AP806 and AP807.
Change-Id: Ia91a4802d02917d1682faa0c81571093d1687d97
Signed-off-by: Stefan Chulski <stefanc@marvell.com>
diff --git a/drivers/marvell/ccu.c b/drivers/marvell/ccu.c
index c73516e..ecf5091 100644
--- a/drivers/marvell/ccu.c
+++ b/drivers/marvell/ccu.c
@@ -30,6 +30,9 @@
((tgt) == DRAM_1_TID) || \
((tgt) == RAR_TID)) ? 1 : 0)
+#define CCU_RGF(win) (MVEBU_CCU_BASE(MVEBU_AP0) + \
+ 0x90 + 4 * (win))
+
/* For storage of CR, SCR, ALR, AHR abd GCR */
static uint32_t ccu_regs_save[MVEBU_CCU_MAX_WINS * 4 + 1];
@@ -366,3 +369,17 @@
return 0;
}
+
+void errata_wa_init(void)
+{
+ /*
+ * EERATA ID: RES-3033912 - Internal Address Space Init state causes
+ * a hang upon accesses to [0xf070_0000, 0xf07f_ffff]
+ * Workaround: Boot Firmware (ATF) should configure CCU_RGF_WIN(4) to
+ * split [0x6e_0000, 0xff_ffff] to values [0x6e_0000, 0x6f_ffff] and
+ * [0x80_0000, 0xff_ffff] that cause accesses to the
+ * segment of [0xf070_0000, 0xf07f_ffff] to act as RAZWI.
+ */
+ mmio_write_32(CCU_RGF(4), 0x37f9b809);
+ mmio_write_32(CCU_RGF(5), 0x7ffa0009);
+}