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Diffstat (limited to 'bsps/riscv/griscv/include/amba.h')
| -rw-r--r-- | bsps/riscv/griscv/include/amba.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/bsps/riscv/griscv/include/amba.h b/bsps/riscv/griscv/include/amba.h new file mode 100644 index 0000000000..e1c5c00464 --- /dev/null +++ b/bsps/riscv/griscv/include/amba.h @@ -0,0 +1,143 @@ +/** + * @file + * @defgroup amba AMBA Driver Handler + * @ingroup sparc_leon3 + * @brief AMBA Plag & Play Bus Driver Macros + */ + +/* + * AMBA Plag & Play Bus Driver Macros + * + * Macros used for AMBA Plug & Play bus scanning + * + * COPYRIGHT (c) 2004. + * Gaisler Research + * + * 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. + */ + +#ifndef __AMBA_H__ +#define __AMBA_H__ + +#ifndef GRLIB_IO_AREA +#define GRLIB_IO_AREA 0xfff00000 +#endif + +#define GRLIB_CONF_AREA 0xff000 +#define GRLIB_AHB_SLAVE_CONF_AREA (1 << 11) + +#define GRLIB_AHB_CONF_WORDS 8 +#define GRLIB_APB_CONF_WORDS 2 +#define GRLIB_AHB_MASTERS 64 +#define GRLIB_AHB_SLAVES 64 +#define GRLIB_APB_SLAVES 16 + +#if defined(RTEMS_MULTIPROCESSING) + #define GRLIB_CLOCK_INDEX \ + (rtems_configuration_get_user_multiprocessing_table() ? GRLIB_Cpu_Index : 0) +#else + #define GRLIB_CLOCK_INDEX 0 +#endif + +#if defined(RTEMS_SMP) +#define GRLIB_COUNTER_GPTIMER_INDEX (GRLIB_CLOCK_INDEX + 1) +#else +#define GRLIB_COUNTER_GPTIMER_INDEX GRLIB_CLOCK_INDEX +#endif + +#define GRLIB_GPTIMER_0_FREQUENCY_SET_BY_BOOT_LOADER 1000000 + +#define GRLIB_IRQMPSTATUS_CPUNR 28 + +#include <grlib/ambapp.h> +#include <grlib/grlib.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* The AMBA Plug&Play info of the bus that the cpu sits on */ +extern struct ambapp_bus ambapp_plb; + +extern uint32_t GRLIB_Cpu_Index; +extern const unsigned char GRLIB_mp_irq; + +extern volatile struct irqmp_regs *GRLIB_IrqCtrl_Regs; +extern struct ambapp_dev *GRLIB_IrqCtrl_Adev; +extern int GRLIB_IrqCtrl_EIrq; +extern volatile struct gptimer_regs *GRLIB_Timer_Regs; +extern struct ambapp_dev *GRLIB_Timer_Adev; +void gptimer_initialize(void); +void irqmp_initialize(void); + +static inline uint32_t grlib_up_counter_frequency(void) +{ + /* + * For simplicity, assume that the interrupt controller uses the processor + * clock. This is at least true on the GR740. + */ + return ambapp_freq_get(&ambapp_plb, GRLIB_IrqCtrl_Adev); +} + +extern rtems_interrupt_lock GRLIB_IrqCtrl_Lock; + + +static inline uint32_t grlib_get_cpu_count( + volatile struct irqmp_regs *irqmp +) +{ + uint32_t mpstat = irqmp->mpstat; + + return ((mpstat >> GRLIB_IRQMPSTATUS_CPUNR) & 0xf) + 1; +} + +#define GRLIB_IRQCTRL_ACQUIRE( _lock_context ) \ + rtems_interrupt_lock_acquire( &GRLIB_IrqCtrl_Lock, _lock_context ) + +#define GRLIB_IRQCTRL_RELEASE( _lock_context ) \ + rtems_interrupt_lock_release( &GRLIB_IrqCtrl_Lock, _lock_context ) + +#define GRLIB_Cpu_Unmask_interrupt( _source, _cpu ) \ + do { \ + rtems_interrupt_lock_context _lock_context; \ + GRLIB_IRQCTRL_ACQUIRE( &_lock_context ); \ + GRLIB_IrqCtrl_Regs->mask[_cpu] |= (1U << (_source)); \ + GRLIB_IRQCTRL_RELEASE( &_lock_context ); \ + } while (0) + +#define GRLIB_Cpu_Mask_interrupt( _source, _cpu ) \ + do { \ + rtems_interrupt_lock_context _lock_context; \ + GRLIB_IRQCTRL_ACQUIRE( &_lock_context ); \ + GRLIB_IrqCtrl_Regs->mask[_cpu] &= ~(1U << (_source)); \ + GRLIB_IRQCTRL_RELEASE( &_lock_context ); \ + } while (0) + +#define GRLIB_Enable_interrupt_broadcast( _source ) \ + do { \ + rtems_interrupt_lock_context _lock_context; \ + uint32_t _mask = 1U << ( _source ); \ + GRLIB_IRQCTRL_ACQUIRE( &_lock_context ); \ + GRLIB_IrqCtrl_Regs->bcast |= _mask; \ + GRLIB_IRQCTRL_RELEASE( &_lock_context ); \ + } while (0) + +#define GRLIB_Disable_interrupt_broadcast( _source ) \ + do { \ + rtems_interrupt_lock_context _lock_context; \ + uint32_t _mask = 1U << ( _source ); \ + GRLIB_IRQCTRL_ACQUIRE( &_lock_context ); \ + GRLIB_IrqCtrl_Regs->bcast &= ~_mask; \ + GRLIB_IRQCTRL_RELEASE( &_lock_context ); \ + } while (0) + +#define BSP_Cpu_Is_interrupt_masked( _source, _cpu ) \ + (!(GRLIB_IrqCtrl_Regs->mask[_cpu] & (1U << (_source)))) + +#ifdef __cplusplus +} +#endif + +#endif /* __AMBA_H__ */ |