allwinner: Add functions to control CPU power/reset
sun50i_cpu_on will be used by the PSCI implementation to initialize
secondary cores for SMP. Unfortunately, sun50i_cpu_off is not usable by
PSCI directly, because it is not possible for a CPU to use this function
to power itself down. Power cannot be shut off until the outputs are
clamped, and MMIO does not work once the outputs are clamped.
But at least CPU0 can shutdown the other cores early in the BL31 boot
process and before shutting down the system.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/plat/allwinner/sun50i_a64/include/sunxi_cpucfg.h b/plat/allwinner/sun50i_a64/include/sunxi_cpucfg.h
new file mode 100644
index 0000000..049c2ad
--- /dev/null
+++ b/plat/allwinner/sun50i_a64/include/sunxi_cpucfg.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __SUNXI_CPUCFG_H__
+#define __SUNXI_CPUCFG_H__
+
+#include <sunxi_mmap.h>
+
+/* c = cluster, n = core */
+#define SUNXI_CPUCFG_CLS_CTRL_REG0(c) (SUNXI_CPUCFG_BASE + 0x0000 + (c) * 16)
+#define SUNXI_CPUCFG_CLS_CTRL_REG1(c) (SUNXI_CPUCFG_BASE + 0x0004 + (c) * 16)
+#define SUNXI_CPUCFG_CACHE_CFG_REG0 (SUNXI_CPUCFG_BASE + 0x0008)
+#define SUNXI_CPUCFG_CACHE_CFG_REG1 (SUNXI_CPUCFG_BASE + 0x000c)
+#define SUNXI_CPUCFG_DBG_REG0 (SUNXI_CPUCFG_BASE + 0x0020)
+#define SUNXI_CPUCFG_GLB_CTRL_REG (SUNXI_CPUCFG_BASE + 0x0028)
+#define SUNXI_CPUCFG_CPU_STS_REG(c) (SUNXI_CPUCFG_BASE + 0x0030 + (c) * 4)
+#define SUNXI_CPUCFG_L2_STS_REG (SUNXI_CPUCFG_BASE + 0x003c)
+#define SUNXI_CPUCFG_RST_CTRL_REG(c) (SUNXI_CPUCFG_BASE + 0x0080 + (c) * 4)
+#define SUNXI_CPUCFG_RVBAR_LO_REG(n) (SUNXI_CPUCFG_BASE + 0x00a0 + (n) * 8)
+#define SUNXI_CPUCFG_RVBAR_HI_REG(n) (SUNXI_CPUCFG_BASE + 0x00a4 + (n) * 8)
+
+#define SUNXI_CPU_POWER_CLAMP_REG(c, n) (SUNXI_R_PRCM_BASE + 0x0140 + \
+ (c) * 16 + (n) * 4)
+#define SUNXI_POWEROFF_GATING_REG(c) (SUNXI_R_PRCM_BASE + 0x0100 + (c) * 4)
+#define SUNXI_R_CPUCFG_CPUS_RST_REG (SUNXI_R_CPUCFG_BASE + 0x0000)
+#define SUNXI_POWERON_RST_REG(c) (SUNXI_R_CPUCFG_BASE + 0x0030 + (c) * 4)
+#define SUNXI_R_CPUCFG_SYS_RST_REG (SUNXI_R_CPUCFG_BASE + 0x0140)
+#define SUNXI_R_CPUCFG_SS_FLAG_REG (SUNXI_R_CPUCFG_BASE + 0x01a0)
+#define SUNXI_R_CPUCFG_CPU_ENTRY_REG (SUNXI_R_CPUCFG_BASE + 0x01a4)
+#define SUNXI_R_CPUCFG_SS_ENTRY_REG (SUNXI_R_CPUCFG_BASE + 0x01a8)
+#define SUNXI_R_CPUCFG_HP_FLAG_REG (SUNXI_R_CPUCFG_BASE + 0x01ac)
+
+#endif /* __SUNXI_CPUCFG_H__ */