ra8_npu_blob.h

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#pragma once
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif

typedef enum : uint32_t {
  k_ra8_npu_blob_magic   = 0x3155504EU, 
  k_ra8_npu_blob_version = 1U,          
} ra8_npu_blob_ident_t;

typedef enum : uint32_t {
  k_ra8_npu_blob_word_magic        = 0U, 
  k_ra8_npu_blob_word_version      = 1U, 
  k_ra8_npu_blob_word_total_bytes  = 2U, 
  k_ra8_npu_blob_word_region_count = 3U, 
  k_ra8_npu_blob_word_cmd_offset   = 4U, 
  k_ra8_npu_blob_word_cmd_bytes    = 5U, 
  k_ra8_npu_blob_word_accel        = 6U, 
  k_ra8_npu_blob_word_checksum     = 7U, 
  k_ra8_npu_blob_header_words      = 8U, 
} ra8_npu_blob_word_t;

typedef enum : uint32_t {
  k_ra8_npu_blob_rdesc_role        = 0U, 
  k_ra8_npu_blob_rdesc_flags       = 1U, 
  k_ra8_npu_blob_rdesc_size        = 2U, 
  k_ra8_npu_blob_rdesc_data_offset = 3U, 
  k_ra8_npu_blob_region_words      = 4U, 
} ra8_npu_blob_rdesc_t;

typedef enum : uint32_t {
  k_ra8_npu_blob_header_bytes      = 32U, 
  k_ra8_npu_blob_region_desc_bytes = 16U, 
  k_ra8_npu_blob_word_bytes        = 4U,  
  k_ra8_npu_blob_arena_align       = 16U, 
} ra8_npu_blob_size_t;

typedef enum : uint32_t {
  k_ra8_npu_blob_role_weights = 0U, 
  k_ra8_npu_blob_role_scratch = 1U, 
  k_ra8_npu_blob_role_input   = 2U, 
  k_ra8_npu_blob_role_output  = 3U, 
  k_ra8_npu_blob_role_other   = 4U, 
} ra8_npu_blob_role_t;

typedef enum : uint32_t {
  k_ra8_npu_blob_rflag_baked = 0x1U, 
} ra8_npu_blob_rflag_t;

typedef enum : uint32_t {
  k_ra8_npu_blob_accel_ethos_u55_256 = 256U, 
} ra8_npu_blob_accel_t;

typedef enum : uint32_t {
  k_ra8_npu_blob_fnv_offset = 0x811C9DC5U, 
  k_ra8_npu_blob_fnv_prime  = 0x01000193U, 
} ra8_npu_blob_fnv_t;

static inline uint32_t ra8_npu_blob_read_word(const uint8_t* buf, uint32_t byte_off)
{
  uint32_t value = 0U;
  for (uint32_t i = 0U; i < k_ra8_npu_blob_word_bytes; i++) {
    value |= (uint32_t)buf[byte_off + i] << (i * 8U);
  }
  return value;
}
 
#ifdef __cplusplus
}
#endif