/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (C) 2017 Renesas Electronics * Copyright (C) 2017 Chris Brandt */ #include #include /* Watchdog Registers */ #define RZA1_WDT_BASE 0xFCFE0000 #define WTCSR (RZA1_WDT_BASE + 0x00) /* Watchdog Timer Control Register */ #define WTCNT (RZA1_WDT_BASE + 0x02) /* Watchdog Timer Counter Register */ #define WRCSR (RZA1_WDT_BASE + 0x04) /* Watchdog Reset Control Register */ /* Standby controller registers (chapter 55) */ #define RZA1_STBCR_BASE 0xFCFE0020 #define STBCR1 (RZA1_STBCR_BASE + 0x00) #define STBCR2 (RZA1_STBCR_BASE + 0x04) #define STBCR3 (RZA1_STBCR_BASE + 0x400) #define STBCR4 (RZA1_STBCR_BASE + 0x404) #define STBCR5 (RZA1_STBCR_BASE + 0x408) #define STBCR6 (RZA1_STBCR_BASE + 0x40c) #define STBCR7 (RZA1_STBCR_BASE + 0x410) #define STBCR8 (RZA1_STBCR_BASE + 0x414) #define STBCR9 (RZA1_STBCR_BASE + 0x418) #define STBCR10 (RZA1_STBCR_BASE + 0x41c) #define STBCR11 (RZA1_STBCR_BASE + 0x420) #define STBCR12 (RZA1_STBCR_BASE + 0x424) #define STBCR13 (RZA1_STBCR_BASE + 0x450) /* Clock Registers */ #define RZA1_FRQCR_BASE 0xFCFE0010 #define FRQCR (RZA1_FRQCR_BASE + 0x00) #define FRQCR2 (RZA1_FRQCR_BASE + 0x04) #define SYSCR1 0xFCFE0400 /* System control register 1 */ #define SYSCR2 0xFCFE0404 /* System control register 2 */ #define SYSCR3 0xFCFE0408 /* System control register 3 */ /* Disable WDT */ #define WTCSR_D 0xA518 #define WTCNT_D 0x5A00 /* Enable all peripheral clocks */ #define STBCR3_D 0x00000000 #define STBCR4_D 0x00000000 #define STBCR5_D 0x00000000 #define STBCR6_D 0x00000000 #define STBCR7_D 0x00000024 #define STBCR8_D 0x00000005 #define STBCR9_D 0x00000000 #define STBCR10_D 0x00000000 #define STBCR11_D 0x000000c0 #define STBCR12_D 0x000000f0 /* * Set all system clocks to full speed. * On reset, the CPU will be running at 1/2 speed. * In the Hardware Manual, see Table 6.3 Settable Frequency Ranges */ #define FRQCR_D 0x0035 #define FRQCR2_D 0x0001 .global lowlevel_init .text .align 2 lowlevel_init: /* PL310 init */ write32 0x3fffff80, 0x00000001 /* Disable WDT */ write16 WTCSR, WTCSR_D write16 WTCNT, WTCNT_D /* Set clocks */ write16 FRQCR, FRQCR_D write16 FRQCR2, FRQCR2_D /* Enable all peripherals(Standby Control) */ write8 STBCR3, STBCR3_D write8 STBCR4, STBCR4_D write8 STBCR5, STBCR5_D write8 STBCR6, STBCR6_D write8 STBCR7, STBCR7_D write8 STBCR8, STBCR8_D write8 STBCR9, STBCR9_D write8 STBCR10, STBCR10_D write8 STBCR11, STBCR11_D write8 STBCR12, STBCR12_D /* For serial booting, enable read ahead caching to speed things up */ #define DRCR_0 0x3FEFA00C write32 DRCR_0, 0x00010100 /* Read Burst ON, Length=2 */ /* Enable all internal RAM */ write8 SYSCR1, 0xFF write8 SYSCR2, 0xFF write8 SYSCR3, 0xFF nop /* back to arch calling code */ mov pc, lr .align 4