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54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "mfg/snowy/mfg_private.h"
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#include "drivers/flash.h"
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#include "flash_region/flash_region.h"
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#include "mfg/snowy/snowy_boot.fpga.auto.h"
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#include "util/attributes.h"
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#define BOOT_FPGA_FLASH_ADDR (FLASH_REGION_MFG_INFO_BEGIN + 0x10000)
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typedef struct PACKED {
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uint16_t fpga_len;
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uint16_t fpga_len_complemented;
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} BootFPGAHeader;
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bool mfg_info_is_boot_fpga_bitstream_written(void) {
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BootFPGAHeader header;
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flash_read_bytes((void *)&header, BOOT_FPGA_FLASH_ADDR, sizeof header);
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return (header.fpga_len != 0xffff &&
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header.fpga_len_complemented != 0xffff);
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}
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void mfg_info_write_boot_fpga_bitstream(void) {
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// Store the bootloader FPGA in the MFG info flash region so that the
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// bootloader can find it.
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_Static_assert(sizeof s_boot_fpga < 1<<16, "FPGA bitstream too big");
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BootFPGAHeader fpga_header = { (uint16_t)sizeof s_boot_fpga,
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(uint16_t)~sizeof s_boot_fpga };
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_Static_assert(
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(BOOT_FPGA_FLASH_ADDR + sizeof fpga_header + sizeof s_boot_fpga)
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< FLASH_REGION_MFG_INFO_END,
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"FPGA bitstream will overflow FLASH_REGION_MFG_INFO!");
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flash_write_bytes((const uint8_t *)&fpga_header,
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BOOT_FPGA_FLASH_ADDR, sizeof fpga_header);
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flash_write_bytes((const uint8_t *)s_boot_fpga,
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BOOT_FPGA_FLASH_ADDR + sizeof fpga_header,
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sizeof s_boot_fpga);
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}
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