# EspSoftware — Espressif software-side primary docs: boot ROM/bootloader, image format, startup, memory, interrupts, time, flashing, debugging

## Obtained

| file | title | version / date | source URL | bytes | pages | sha256 (first 16) | relevance |
|---|---|---|---|---|---|---|---|
| espressif-software/esp-idf-programming-guide_esp32p4_en_v5.3.2.pdf | ESP-IDF Programming Guide — ESP32-P4 | v5.3.2, 2024-12-06 | https://docs.espressif.com/projects/esp-idf/en/v5.3.2/esp32p4/esp-idf-en-v5.3.2-esp32p4.pdf | 13656675 | 2262 | adf06f5531a5c845 | verified TOC pages: 2.9.1 App Image Format p.1364, 2.9.2 Bootloader Image Format p.1370, Heap Memory Allocation p.1593, Interrupt Allocation p.1648, System Time p.1748, ULP LP-Core Coprocessor Programming p.1760, 4.2 Application Startup Flow p.1803 (4.2.1 First/4.2.2 Second Stage Bootloader p.1804), 4.3 Bootloader p.1806, 4.13 JTAG Debugging p.1873, 4.14 Linker Script Generation p.1914, 4.16 Memory Types p.1933, 4.18 Partition Tables p.1938, 5.2.1 Flash Encryption p.2016, 5.2.2 Secure Boot V2 p.2031 |
| espressif-software/esp-idf-programming-guide_esp32p4_en_v6.0.2_html.zip | ESP-IDF Programming Guide — ESP32-P4 (official offline HTML bundle) | v6.0.2 (current stable, matches `src/soc.zig`) | https://docs.espressif.com/projects/esp-idf/en/v6.0.2/esp32p4/esp-idf-en-v6.0.2.zip | 51594786 | 393 html pages (zip verified `unzip -t` OK) | d3f0f339d4a86a04 | non-PDF fallback: Espressif stopped publishing PDFs after v5.3.2, so v6.0.2 (the version this project cross-references) exists only as the official HTML zip linked in the docs footer; same chapters as above (api-guides/startup, app_image_format, memory-types, interrupt-allocation, system-time, jtag-debugging, ulp-lp-core) |
| espressif-software/esptool_serial-protocol_esp32p4_v5.3.1.html | esptool Documentation — Serial Protocol (ESP32-P4 target render) | esptool v5.3.1, released 2026-06-29 | https://docs.espressif.com/projects/esptool/en/latest/esp32p4/advanced-topics/serial-protocol.html | 55340 | n/a | a00a70719b10fbd3 | ROM serial loader: SLIP framing, packet/command format, ESP_SYNC/ESP_MEM_*/ESP_FLASH_BEGIN-DATA-END, stub loader, `tools/rom.zig` reference |
| espressif-software/esptool_firmware-image-format_esp32p4_v5.3.1.html | esptool Documentation — Firmware Image Format (ESP32-P4 render) | esptool v5.3.1, 2026-06-29 | https://docs.espressif.com/projects/esptool/en/latest/esp32p4/advanced-topics/firmware-image-format.html | 16750 | n/a | f9b6269b5d9f3601 | ESP image v1 header, extended header, segment headers, checksum + SHA256 append; `tools/image.zig` reference |
| espressif-software/esptool_boot-mode-selection_esp32p4_v5.3.1.html | esptool Documentation — Boot Mode Selection (ESP32-P4 render) | esptool v5.3.1, 2026-06-29 | https://docs.espressif.com/projects/esptool/en/latest/esp32p4/advanced-topics/boot-mode-selection.html | 30917 | n/a | 100fdf423ba92cc0 | strapping pins, download/UART boot vs SPI boot, ROM boot log messages |
| espressif-software/esptool_serial-protocol_v5.3.1.rst | esptool docs source (canonical reStructuredText) | tag v5.3.1 | https://raw.githubusercontent.com/espressif/esptool/v5.3.1/docs/en/advanced-topics/serial-protocol.rst | 76409 | n/a | 016dbe246a0c0edf | version-pinned canonical source of the above (unresolved `IDF_TARGET_*` substitutions) |
| espressif-software/esptool_firmware-image-format_v5.3.1.rst | esptool docs source (canonical reStructuredText) | tag v5.3.1 | https://raw.githubusercontent.com/espressif/esptool/v5.3.1/docs/en/advanced-topics/firmware-image-format.rst | 15433 | n/a | 1f0cfe32a766b8ab | pinned canonical image-format spec source |
| espressif-software/esptool_boot-mode-selection_v5.3.1.rst | esptool docs source (canonical reStructuredText) | tag v5.3.1 | https://raw.githubusercontent.com/espressif/esptool/v5.3.1/docs/en/advanced-topics/boot-mode-selection.rst | 21887 | n/a | 567510a46d727a51 | pinned canonical boot-mode spec source |

## Not obtained

| wanted | why not | best known pointer |
|---|---|---|
| ESP-IDF Programming Guide PDF for v6.x (esp32p4) | Espressif no longer builds PDFs: every `esp-idf-en-<v>-esp32p4.pdf` guess returns 404 for v5.3.3 and all v5.4/v5.5/v6.0.x; the v6.0.2 page footer offers only "Download HTML" (zip). Newest PDF that exists is v5.3.2, obtained above; v6.0.2 taken as HTML zip. | https://docs.espressif.com/projects/esp-idf/en/v6.0.2/esp32p4/ (footer link `esp-idf-en-v6.0.2.zip`) |
| esptool documentation offline PDF | No PDF or HTML-zip artifact published for the esptool docs project (all `esptool-en-*.pdf` name patterns 404, no footer download link). Fell back to official rendered HTML + pinned `.rst` sources. | https://docs.espressif.com/projects/esptool/en/latest/esp32p4/ |
| openocd-esp32 documentation PDF | The `docs.espressif.com/projects/openocd-esp32/` project is retired — `/en/latest/` and `/en/latest/esp32p4/index.html` both return the ReadTheDocs 404 page (deleted, not saved). JTAG/OpenOCD material now lives in the ESP-IDF guide chapter 4.13 (obtained). | https://github.com/espressif/openocd-esp32 (repo `README`/`doc/`) |
| ESP32-P4 boot ROM / mask ROM description document | No prose document exists. Espressif publishes only the ROM ELF symbol tables and ROM linker scripts; per instructions no code was copied. Local authoritative copies: ROM ELF `/home/goblin/.espressif/tools/esp-rom-elfs/20241011/esp32p4_rev0_rom.elf`; ROM symbol/linker scripts `/home/goblin/esp/esp-idf/components/esp_rom/esp32p4/ld/` (`esp32p4.rom.ld`, `esp32p4.rom.api.ld`, `esp32p4.rom.systimer.ld`, `esp32p4.rom.version.ld`, `esp32p4.rom.eco5.*`, plus LP-core `esp32p4lp.rom.*.ld`). | https://github.com/espressif/esp-rom-elfs ; https://github.com/espressif/esp-idf/tree/master/components/esp_rom/esp32p4/ld |
| Standalone "ESP32-P4 Serial Protocol" / "Boot Mode Selection" / secure-boot application-note PDFs | Espressif does not publish these as standalone PDFs for ESP32-P4; the content is only in the esptool docs (obtained) and ESP-IDF guide ch. 5.2 (obtained). | https://www.espressif.com/en/support/documents/technical-documents |

## Belongs elsewhere

- ESP32-P4 Technical Reference Manual and Datasheet — `espressif-silicon/` (also already local at `01-esp32p4-m3/docs/`)
- RISC-V unprivileged/privileged/debug specifications — `riscv-isa/`
- Espressif custom ISA extension (`xesppie` / PIE) and LP-core ISA documents — `espressif-custom-isa/`