2 Commits

Include renames

Author	SHA1	Message	Date
Robert Allan JamesandClaude Sonnet 5	5e46f18fd9	fdt.c: node-scoped lookup extension (FABRIC-3.md SSIV.3/SSV.3 shared item) ... Adds fdt_find_node_by_compatible() and fdt_find_prop_in_node() to the minimal FDT reader -- the extension fdt.h's own header comment already flagged as a known future need ("item 0.6 will need node-scoped reg lookups"), now with real consumers: the Pi 5's UART/mailbox register addresses (native boot, no ACPI) and the Milk-V Mars's real PLIC base address (currently hardcoded to QEMU-virt's own value). fdt_find_node_by_compatible() matches any entry in a node's NUL-separated "compatible" list, first match in document order. fdt_find_prop_in_node() scopes to that one node's own direct properties only -- stops at the first child node or the node's own end, per the DT spec's ordering guarantee that a node's properties always precede its children. Same minimal, non-tree-building, single-linear-scan-per-call style as the existing reader; no new state, no allocation. Compile-only verification -- no caller wired in yet, this is the shared primitive both boards' own punch-list items will call once built. Verified 3-arch boot to ok> (amd64/aarch64/riscv64, each in the foreground). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019YcT3H2PQeyujrzjqS3Var	2026-09-04 13:05:42 -04:00
Robert Allan James	accd79fc70	riscv64: integrate minimal flattened devicetree reader and switch timer to time CSR ... Punch list §25 item 0.3 NOT complete. - Added `starkernel/fdt.h` and `fdt.c` for minimal read-only devicetree parsing: sufficient for boot-time lookups such as `timebase-frequency`. - Bootloader now captures the devicetree blob (DTB) from `EFI_DTB_TABLE_GUID` into `BootInfo::dtb`. - RISC-V timer subsystem now uses the `time` CSR as the primary timestamp source, abandoning the hardcoded `cycle` frequency assumption. - Timer rate is read from `timebase-frequency` in the DTB when accessible; otherwise, a fallback value is used with a RELATIVE trust level. - Integrated the SBI TIME extension for one-shot timer deadlines, ensuring re-arming occurs after each tick to avoid missing heartbeats. Verified: riscv64 builds clean, boots to the ok> prompt with no regression; `riscv64/timer.c` reports accurate frequencies on QEMU's default firmware. Signed-off-by: Robert Allan James <robert.allan.james@gmail.com>	2026-08-03 13:10:17 -04:00