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https://github.com/antonblanchard/microwatt.git
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6aadad5a75
It will look for an ELF binary at the flash offset specified for the board (currently 0x300000 on Arty but that could be changed). Note: litedram is regenerated in order to rebuild the init code, which was done using a newer version of litedram from LiteX. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
88 lines
3.7 KiB
C
88 lines
3.7 KiB
C
#ifndef __MICROWATT_SOC_H
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#define __MICROWATT_SOC_H
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/*
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* Microwatt SoC memory map
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*/
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#define MEMORY_BASE 0x00000000 /* "Main" memory alias, either BRAM or DRAM */
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#define DRAM_BASE 0x40000000 /* DRAM if present */
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#define BRAM_BASE 0x80000000 /* Internal BRAM */
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#define SYSCON_BASE 0xc0000000 /* System control regs */
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#define UART_BASE 0xc0002000 /* UART */
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#define XICS_BASE 0xc0004000 /* Interrupt controller */
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#define SPI_FCTRL_BASE 0xc0006000 /* SPI flash controller registers */
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#define DRAM_CTRL_BASE 0xc0100000 /* LiteDRAM control registers */
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#define SPI_FLASH_BASE 0xf0000000 /* SPI Flash memory map */
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#define DRAM_INIT_BASE 0xff000000 /* Internal DRAM init firmware */
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/*
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* Register definitions for the syscon registers
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*/
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#define SYS_REG_SIGNATURE 0x00
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#define SYS_REG_INFO 0x08
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#define SYS_REG_INFO_HAS_UART (1ull << 0)
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#define SYS_REG_INFO_HAS_DRAM (1ull << 1)
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#define SYS_REG_INFO_HAS_BRAM (1ull << 2)
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#define SYS_REG_INFO_HAS_SPI_FLASH (1ull << 3)
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#define SYS_REG_BRAMINFO 0x10
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#define SYS_REG_BRAMINFO_SIZE_MASK 0xfffffffffffffull
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#define SYS_REG_DRAMINFO 0x18
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#define SYS_REG_DRAMINFO_SIZE_MASK 0xfffffffffffffull
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#define SYS_REG_CLKINFO 0x20
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#define SYS_REG_CLKINFO_FREQ_MASK 0xffffffffffull
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#define SYS_REG_CTRL 0x28
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#define SYS_REG_CTRL_DRAM_AT_0 (1ull << 0)
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#define SYS_REG_CTRL_CORE_RESET (1ull << 1)
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#define SYS_REG_CTRL_SOC_RESET (1ull << 2)
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#define SYS_REG_DRAMINITINFO 0x30
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#define SYS_REG_SPI_INFO 0x38
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#define SYS_REG_SPI_INFO_FLASH_OFF_MASK 0xffffffff
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/*
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* Register definitions for the potato UART
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*/
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#define POTATO_CONSOLE_TX 0x00
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#define POTATO_CONSOLE_RX 0x08
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#define POTATO_CONSOLE_STATUS 0x10
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#define POTATO_CONSOLE_STATUS_RX_EMPTY 0x01
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#define POTATO_CONSOLE_STATUS_TX_EMPTY 0x02
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#define POTATO_CONSOLE_STATUS_RX_FULL 0x04
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#define POTATO_CONSOLE_STATUS_TX_FULL 0x08
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#define POTATO_CONSOLE_CLOCK_DIV 0x18
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#define POTATO_CONSOLE_IRQ_EN 0x20
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/*
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* Register definitions for the SPI controller
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*/
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#define SPI_REG_DATA 0x00 /* Byte access: single wire transfer */
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#define SPI_REG_DATA_DUAL 0x01 /* Byte access: dual wire transfer */
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#define SPI_REG_DATA_QUAD 0x02 /* Byte access: quad wire transfer */
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#define SPI_REG_CTRL 0x04 /* Reset and manual mode control */
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#define SPI_REG_CTRL_RESET 0x01 /* reset all registers */
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#define SPI_REG_CTRL_MANUAL_CS 0x02 /* assert CS, enable manual mode */
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#define SPI_REG_CTRL_CKDIV_SHIFT 8 /* clock div */
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#define SPI_REG_CTRL_CKDIV_MASK (0xff << SPI_REG_CTRL_CKDIV_SHIFT)
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#define SPI_REG_AUTO_CFG 0x08 /* Automatic map configuration */
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#define SPI_REG_AUTO_CFG_CMD_SHIFT 0 /* Command to use for reads */
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#define SPI_REG_AUTO_CFG_CMD_MASK (0xff << SPI_REG_AUTO_CFG_CMD_SHIFT)
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#define SPI_REG_AUTO_CFG_DUMMIES_SHIFT 8 /* # dummy cycles */
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#define SPI_REG_AUTO_CFG_DUMMIES_MASK (0x7 << SPI_REG_AUTO_CFG_DUMMIES_SHIFT)
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#define SPI_REG_AUTO_CFG_MODE_SHIFT 11 /* SPI wire mode */
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#define SPI_REG_AUTO_CFG_MODE_MASK (0x3 << SPI_REG_AUTO_CFG_MODE_SHIFT)
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#define SPI_REG_AUT_CFG_MODE_SINGLE (0 << 11)
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#define SPI_REG_AUT_CFG_MODE_DUAL (2 << 11)
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#define SPI_REG_AUT_CFG_MODE_QUAD (3 << 11)
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#define SPI_REG_AUTO_CFG_ADDR4 (1u << 13) /* 3 or 4 addr bytes */
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#define SPI_REG_AUTO_CFG_CKDIV_SHIFT 16 /* clock div */
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#define SPI_REG_AUTO_CFG_CKDIV_MASK (0xff << SPI_REG_AUTO_CFG_CKDIV_SHIFT)
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#define SPI_REG_AUTO_CFG_CSTOUT_SHIFT 24 /* CS timeout */
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#define SPI_REG_AUTO_CFG_CSTOUT_MASK (0x3f << SPI_REG_AUTO_CFG_CSTOUT_SHIFT)
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#endif /* __MICROWATT_SOC_H */
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