reset_tt_bh.h File Reference

#include <stdint.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/sys/util.h>

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Macros
#define	TT_BH_RESET_BANK_STRIDE   4U
#define	TT_BH_RESET_NUM_BANKS(node_id)
	Number of 32-bit banks for a BH reset DT node.

Functions
int	reset_tt_bh_write (const struct device *dev, uint32_t value)
	Absolute write to a BH reset-unit bank register.
int	reset_tt_bh_lines_assert (const struct device *dev, uint32_t offset, uint32_t mask)
	Assert lines in mask at offset with a single RMW.
int	reset_tt_bh_lines_deassert (const struct device *dev, uint32_t offset, uint32_t mask)
	Deassert lines in mask at offset with a single RMW.

Macro Definition Documentation

TT_BH_RESET_BANK_STRIDE

#define TT_BH_RESET_BANK_STRIDE   4U

Byte stride between consecutive banks in a multi-bank BH reset region.

TT_BH_RESET_NUM_BANKS

#define TT_BH_RESET_NUM_BANKS

(

node_id

)

Value:

        COND_CODE_1(DT_NODE_HAS_PROP(node_id, n_banks), (DT_PROP(node_id, n_banks)),               \
                    (DT_REG_SIZE(node_id) / TT_BH_RESET_BANK_STRIDE))

Number of 32-bit banks for a BH reset DT node.

Prefers n-banks (emul / non-MMIO). Otherwise derives from reg size / TT_BH_RESET_BANK_STRIDE (HW).

Function Documentation

reset_tt_bh_lines_assert()

int reset_tt_bh_lines_assert	(	const struct device *	dev,
		uint32_t	offset,
		uint32_t	mask )

Assert lines in mask at offset with a single RMW.

offset is a byte offset from the controller base (typically a multiple of TT_BH_RESET_BANK_STRIDE). Active-low: clears bits in mask. Invalid if offset is out of range or mask shares no bits with the controller's reset-mask.

reset_tt_bh_lines_deassert()

int reset_tt_bh_lines_deassert	(	const struct device *	dev,
		uint32_t	offset,
		uint32_t	mask )

Deassert lines in mask at offset with a single RMW.

Active-low: sets bits in mask. Used for dual-field banks (eth/ddr) where tile and RISC halves share one MMIO word, multi-bank tensix regions, and full-bank releases.

reset_tt_bh_write()

int reset_tt_bh_write	(	const struct device *	dev,
		uint32_t	value )

Absolute write to a BH reset-unit bank register.

Sets the entire bank word at offset 0 (no read-modify-write). Use when init must force a known full-register state (e.g. dual-field tile half deasserted with RISC half still asserted). Prefer reset_tt_bh_lines_assert/deassert when only selected lines should change.