ref: 39c3fd117ab4988c041800490b23c2aedb1858d3
dir: /sys/src/boot/zynq/fsbl.s/
#include "mem.h" #define Rb R10 #define SET(R, V) MOVW $(V), R0 ; MOVW R0, (R)(Rb) #define RMW(r, m, v) MOVW (r)(Rb), R0; BIC $(m), R0; ORR $(v), R0; MOVW R0, (r)(Rb) TEXT _start(SB), $-4 WORD $0xea000006 MOVW $abort(SB), R15 MOVW $abort(SB), R15 MOVW $abort(SB), R15 MOVW $abort(SB), R15 MOVW $abort(SB), R15 MOVW $abort(SB), R15 MOVW $abort(SB), R15 TEXT reloc(SB), $-4 MOVW $(1<<7|1<<6|0x13), R0 MOVW R0, CPSR MOVW $STACKTOP, R13 MOVW $_start(SB), R0 MCR CpMMU, 0, R0, C(12), C(0) MOVW $SLCR_BASE, Rb SET(SLCR_UNLOCK, UNLOCK_KEY) MOVW $0, R0 MCR 15, 0, R0, C(8), C(7), 0 MCR 15, 0, R0, C(7), C(5), 0 MCR 15, 0, R0, C(7), C(5), 6 MOVW $0xc5047a, R1 MCR 15, 0, R1, C(1), C(0), 0 DSB ISB CMP.S $0, R15 BL.LT reset(SB) MOVW $0xf, R1 MOVW $0xffff0000, R3 MOVW $0xe58a1910, R0 MOVW R0, (R3) MOVW $0xf57ff04f, R0 MOVW R0, 4(R3) MOVW $0xf57ff06f, R0 MOVW R0, 8(R3) MOVW $0xe28ef000, R0 MOVW R0, 12(R3) MOVW $reset(SB), R14 DSB ISB MOVW R3, R15 TEXT reset(SB), $-4 BL pllsetup(SB) BL miosetup(SB) BL ddrsetup(SB) BL uartsetup(SB) MOVW $SLCR_BASE, Rb SET(SLCR_LOCK, LOCK_KEY) // BL memtest(SB) MOVW $setR12(SB), R12 BL main(SB) B abort(SB) TEXT pllsetup(SB), $0 MOVW $SLCR_BASE, Rb SET(ARM_PLL_CFG, ARM_PLL_CFG_VAL) SET(DDR_PLL_CFG, DDR_PLL_CFG_VAL) SET(IO_PLL_CFG, IO_PLL_CFG_VAL) MOVW $(ARM_FDIV | PLL_BYPASS_FORCE), R0 MOVW R0, ARM_PLL_CTRL(Rb) ORR $(PLL_RESET), R4 MOVW R4, ARM_PLL_CTRL(Rb) MOVW R0, ARM_PLL_CTRL(Rb) MOVW $(DDR_FDIV | PLL_BYPASS_FORCE), R0 MOVW R0, DDR_PLL_CTRL(Rb) ORR $(PLL_RESET), R4 MOVW R4, DDR_PLL_CTRL(Rb) MOVW R0, DDR_PLL_CTRL(Rb) MOVW $(IO_FDIV | PLL_BYPASS_FORCE), R0 MOVW R0, IO_PLL_CTRL(Rb) ORR $(PLL_RESET), R4 MOVW R4, IO_PLL_CTRL(Rb) MOVW R0, IO_PLL_CTRL(Rb) _pllsetupl: MOVW PLL_STATUS(Rb), R0 AND $7, R0 CMP.S $7, R0 BNE _pllsetupl SET(ARM_PLL_CTRL, ARM_FDIV) SET(DDR_PLL_CTRL, DDR_FDIV) SET(IO_PLL_CTRL, IO_FDIV) SET(ARM_CLK_CTRL, 0x1f << 24 | CPU_DIV << 8) SET(UART_CLK_CTRL, UART_DIV << 8 | 3) SET(DDR_CLK_CTRL, DDR_DIV3 << 20 | DDR_DIV2 << 26 | 3) SET(DCI_CLK_CTRL, DCI_DIV0 << 8 | DCI_DIV1 << 20 | 1) SET(GEM0_RCLK_CTRL, 1) SET(GEM1_RCLK_CTRL, 0) SET(GEM0_CLK_CTRL, ETH_DIV0 << 8 | ETH_DIV1 << 20 | 1) SET(GEM1_CLK_CTRL, 0) SET(GPIOB_CTRL, VREF_SW_EN) SET(APER_CLK_CTRL, LQSPI_CLK_EN | GPIO_CLK_EN | UART0_CLK_EN | UART1_CLK_EN | I2C0_CLK_EN | SDIO1_CLK_EN | GEM0_CLK_EN | USB0_CLK_EN | USB1_CLK_EN | DMA_CLK_EN) SET(SMC_CLK_CTRL, 0x3C20) SET(LQSPI_CLK_CTRL, QSPI_DIV << 8 | 1) SET(SDIO_CLK_CTRL, SDIO_DIV << 8 | 2) SET(SPI_CLK_CTRL, 0x3F00) SET(CAN_CLK_CTRL, 0x501900) SET(PCAP_CLK_CTRL, PCAP_DIV << 8 | 1) RET TEXT miosetup(SB), $0 MOVW $SLCR_BASE, Rb SET(UART_RST_CTRL, 0xf) SET(UART_RST_CTRL, 0) MOVW $miodata(SB), R1 ADD $MIO_PIN_0, Rb, R2 MOVW $54, R3 BL copy(SB) MOVW $0, R0 MOVW R0, MIO_MST_TRI0(Rb) MOVW R0, MIO_MST_TRI1(Rb) RET TEXT copy(SB), $0 _copyl: MOVW.P 4(R1), R0 MOVW.P R0, 4(R2) SUB.S $1, R3 BNE _copyl RET TEXT ddrsetup(SB), $0 MOVW $SLCR_BASE, Rb RMW(DDRIOB_DCI_CTRL, DCI_RESET, DCI_RESET) RMW(DDRIOB_DCI_CTRL, DCI_RESET, 0) RMW(DDRIOB_DCI_CTRL, DDRIOB_DCI_CTRL_MASK, DCI_NREF | DCI_ENABLE | DCI_RESET) MOVW $ddriob(SB), R1 ADD $DDRIOB_ADDR0, Rb, R2 MOVW $12, R3 BL copy(SB) MOVW $ddrdata(SB), R1 _ddrl1: MOVW.P 4(R1), R2 ORR.S $0, R2 BEQ _ddrl2 MOVW.P 4(R1), R3 MOVW.P 4(R1), R4 AND R3, R4 MOVW (R2), R0 BIC R3, R0 ORR R4, R0 MOVW R0, (R2) B _ddrl1 _ddrl2: MOVW DDRIOB_DCI_STATUS(Rb), R0 AND.S $(1<<13), R0 BEQ _ddrl2 MOVW $DDR_BASE, Rb RMW(DDRC_CTRL, 0x1ffff, 0x81) _ddrl4: MOVW DDR_MODE_STS(Rb), R0 AND.S $7, R0 BEQ _ddrl4 MOVW $MP_BASE, Rb SET(FILTER_START, 0) RET TEXT memtest(SB), $0 MOVW $0, R0 ADD $(1024 * 1024 * 10), R0, R1 _testl: MOVW R0, (R0) ADD $4, R0 CMP.S R0, R1 BNE _testl MOVW $0, R0 _testl2: MOVW (R0), R2 CMP.S R0, R2 BNE _no ADD $4, R0 CMP.S R0, R1 BNE _testl2 MOVW $'.', R0 BL putc(SB) RET _no: MOVW $'!', R0 BL putc(SB) RET TEXT uartsetup(SB), $0 MOVW $UART1_BASE, Rb SET(UART_CTRL, 0x17) SET(UART_MODE, 0x20) SET(UART_SAMP, 15) SET(UART_BAUD, 14) RET TEXT putc(SB), $0 MOVW $UART1_BASE, Rb CMP.S $10, R0 BNE _putcl MOVW R0, R2 MOVW $13, R0 BL putc(SB) MOVW R2, R0 _putcl: MOVW UART_STAT(Rb), R1 AND.S $0x10, R1 BNE _putcl AND $0xFF, R0 MOVW R0, UART_DATA(Rb) RET TEXT jump(SB), $-4 MOVW R0, R15 TEXT abort(SB), $0 MOVW $'?', R0 BL putc(SB) _loop: WFE B _loop #define TRI 1 #define LVCMOS18 (1<<9) #define LVCMOS25 (2<<9) #define LVCMOS33 (3<<9) #define HSTL (4<<9) #define PULLUP (1<<12) #define NORECV (1<<13) #define FAST (1<<8) #define MUX(a, b, c, d) ((a)<<1 | (b)<<2 | (c)<<3 | (d)<<5) #define NO (TRI | LVCMOS33) #define SPI (MUX(1, 0, 0, 0) | LVCMOS33) #define UART (MUX(0, 0, 0, 7) | LVCMOS33) #define SD (MUX(0, 0, 0, 4) | LVCMOS33) #define ETX (MUX(1, 0, 0, 0) | HSTL | NORECV | PULLUP) #define ERX (MUX(1, 0, 0, 0) | HSTL | TRI | PULLUP) #define USB (MUX(0, 1, 0, 0) | LVCMOS18) #define MDCLK (MUX(0, 0, 0, 4) | HSTL) #define MDDATA (MUX(0, 0, 0, 4) | HSTL) TEXT miodata(SB), $-4 WORD $NO // 0 WORD $SPI // 1 WORD $SPI // 2 WORD $SPI // 3 WORD $SPI // 4 WORD $SPI // 5 WORD $SPI // 6 WORD $NO // 7 WORD $UART // 8 WORD $(UART|TRI) // 9 WORD $SD // 10 WORD $SD // 11 WORD $SD // 12 WORD $SD // 13 WORD $SD // 14 WORD $SD // 15 WORD $ETX // 16 WORD $ETX // 17 WORD $ETX // 18 WORD $ETX // 19 WORD $ETX // 20 WORD $ETX // 21 WORD $ERX // 22 WORD $ERX // 23 WORD $ERX // 24 WORD $ERX // 25 WORD $ERX // 26 WORD $ERX // 27 WORD $USB // 28 WORD $USB // 29 WORD $USB // 30 WORD $USB // 31 WORD $USB // 32 WORD $USB // 33 WORD $USB // 34 WORD $USB // 35 WORD $USB // 36 WORD $USB // 37 WORD $USB // 38 WORD $USB // 39 WORD $USB // 40 WORD $USB // 41 WORD $USB // 42 WORD $USB // 43 WORD $USB // 44 WORD $USB // 45 WORD $USB // 46 WORD $USB // 47 WORD $USB // 48 WORD $USB // 49 WORD $USB // 50 WORD $USB // 51 WORD $MDCLK // 52 WORD $MDDATA // 53