1 files changed, 91 insertions, 0 deletions

diff --git a/firmware/target/mips/ingenic_x1000/boot-x1000.h b/firmware/target/mips/ingenic_x1000/boot-x1000.h
new file mode 100644
index 0000000000..400eb93dc1
--- /dev/null
+++ b/firmware/target/mips/ingenic_x1000/boot-x1000.h
@@ -0,0 +1,91 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2021 Aidan MacDonald
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifndef __BOOT_X1000_H__
+#define __BOOT_X1000_H__
+
+#include "x1000/cpm.h"
+#include <stdbool.h>
+
+enum {
+    BOOT_OPTION_ROCKBOX = 0,
+    BOOT_OPTION_OFW_PLAYER,
+    BOOT_OPTION_OFW_RECOVERY,
+};
+
+enum {
+    /* 3 bits to store the boot option selected by the SPL */
+    BOOT_OPTION_MASK  = 0x7,
+    BOOT_OPTION_SHIFT = 0,
+
+    /* Set after running clk_init() and setting up system clocks */
+    BOOT_FLAG_CLK_INIT = (1 << 31),
+
+    /* Set by the SPL if it was loaded over USB boot */
+    BOOT_FLAG_USB_BOOT = (1 << 30),
+};
+
+/* Note: these functions are inlined to minimize SPL code size.
+ * They are private to the X1000 early boot code anyway... */
+
+static inline void cpm_scratch_set(uint32_t value)
+{
+    /* TODO: see if this holds its state over a WDT reset */
+    REG_CPM_SCRATCH_PROT = 0x5a5a;
+    REG_CPM_SCRATCH = value;
+    REG_CPM_SCRATCH_PROT = 0xa5a5;
+}
+
+static inline void init_boot_flags(void)
+{
+    cpm_scratch_set(0);
+}
+
+static inline bool get_boot_flag(uint32_t bit)
+{
+    return (REG_CPM_SCRATCH & bit) != 0;
+}
+
+static inline void set_boot_flag(uint32_t bit)
+{
+    cpm_scratch_set(REG_CPM_SCRATCH | bit);
+}
+
+static inline void clr_boot_flag(uint32_t bit)
+{
+    cpm_scratch_set(REG_CPM_SCRATCH & ~bit);
+}
+
+static inline void set_boot_option(int opt)
+{
+    uint32_t r = REG_CPM_SCRATCH;
+    r &= ~(BOOT_OPTION_MASK << BOOT_OPTION_SHIFT);
+    r |= (opt & BOOT_OPTION_MASK) << BOOT_OPTION_SHIFT;
+    cpm_scratch_set(r);
+}
+
+static inline int get_boot_option(void)
+{
+    uint32_t r = REG_CPM_SCRATCH;
+    return (r >> BOOT_OPTION_SHIFT) & BOOT_OPTION_MASK;
+}
+
+#endif /* __BOOT_X1000_H__ */