--- c/src/lib/libbsp/riscv32/hifive1/start/bspstart.c | 65 +++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 c/src/lib/libbsp/riscv32/hifive1/start/bspstart.c
diff --git a/c/src/lib/libbsp/riscv32/hifive1/start/bspstart.c b/c/src/lib/libbsp/riscv32/hifive1/start/bspstart.c new file mode 100644 index 0000000..efef4e0 --- /dev/null +++ b/c/src/lib/libbsp/riscv32/hifive1/start/bspstart.c @@ -0,0 +1,65 @@ +/* + * Copyright (c) 2017 + * Denis Obrezkov <denisobrez...@gmail.com> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#include <bsp.h> +#include <bsp/bootcard.h> +#include <bsp/prci.h> +#include <bsp/fe310.h> + +/* + * This routine make initialization of HiFive1 (FE310) counters. + */ + +void bsp_start( void ) +{ + volatile uint32_t * pll_reg = (volatile uint32_t *) PRCI_PLLCFG; + volatile uint32_t * high_freq_reg = (volatile uint32_t *) PRCI_HFROSCCFG; + volatile uint32_t * spi0 = (volatile uint32_t *) 0x10014000; + + volatile uint64_t * mtime_reg = (volatile uint64_t * ) 0x0200bff8; + volatile uint64_t * mtimecmp_reg = (volatile uint64_t * ) 0x02004000; + +#ifdef USE_HFROSC + /* Setting up osc frequency */ + uint32_t tmp_reg = 0; + /* Install divider in high frequency oscillator */ + tmp_reg |= (HFROSC_DIV_VAL & 0x2f) << HFROSC_DIV_OFFSET; + tmp_reg |= (HFROSC_TRIM_VAL & 0x1F) << HFROSC_TRIM_OFFSET; + tmp_reg |= (HFROSC_EN_VAL & 0x1) << HFROSC_EN_OFFSET; + (*high_freq_reg) = tmp_reg; + while (( (*high_freq_reg) & ((HFROSC_RDY_VAL & 0x1) \ + << HFROSC_RDY_OFFSET)) == 0 ) { + ; + } +#endif /* USE_HFROSC */ + +#ifdef USE_HFXOSC + volatile uint32_t * ext_freq_reg = (volatile uint32_t *) PRCI_HFXOSCCFG; + (*ext_freq_reg) |= ((HFXOSC_EN_VAL & 0x1) << HFXOSC_EN_OFFSET); + while (( (*ext_freq_reg) & ((HFXOSC_RDY_VAL & 0x1) \ + << HFXOSC_RDY_OFFSET)) == 0 ) { + ; + } + (*pll_reg) |= (0x1 << 18); + (*pll_reg) |= (0x1 << 17); + (*pll_reg) |= (0x1 << PLL_SEL_OFFSET); + (*high_freq_reg) &= ~(0x1 << HFROSC_EN_OFFSET); + +#endif /* USE_HFXOSC */ +#ifndef USE_PLL + /* Disable PLL */ + (*pll_reg) &= ~(0x1 << PLL_SEL_OFFSET); +#else + +#endif + + bsp_interrupt_initialize(); + +} + -- 2.1.4 _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
