Define SSDT hotplug-able memory devices in _SB namespace. The dynamically generated SSDT includes per memory device hotplug methods. These methods just call methods defined in the DSDT. Also dynamically generate a MTFY method and a MEON array of the online/available memory devices. Add file src/ssdt-mem.dsl with directions for generating the per-memory device processor object AML code. The design is taken from SSDT cpu generation.
Signed-off-by: Vasilis Liaskovitis vasilis.liaskovitis@profitbricks.com --- src/ssdt-mem.dsl | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 66 insertions(+), 0 deletions(-) create mode 100644 src/ssdt-mem.dsl
diff --git a/src/ssdt-mem.dsl b/src/ssdt-mem.dsl new file mode 100644 index 0000000..9586643 --- /dev/null +++ b/src/ssdt-mem.dsl @@ -0,0 +1,66 @@ +/* This file is the basis for the ssdt_mem[] variable in src/acpi.c. + * It is similar in design to the ssdt_proc variable. + * It defines the contents of the per-cpu Processor() object. At + * runtime, a dynamically generated SSDT will contain one copy of this + * AML snippet for every possible memory device in the system. The + * objects will * be placed in the _SB_ namespace. + * + * To generate a new ssdt_memc[], run the commands: + * cpp -P src/ssdt-mem.dsl > out/ssdt-mem.dsl.i + * iasl -ta -p out/ssdt-mem out/ssdt-mem.dsl.i + * tail -c +37 < out/ssdt-mem.aml | hexdump -e '" " 8/1 "0x%02x," "\n"' + * and then cut-and-paste the output into the src/acpi.c ssdt_mem[] + * array. + * + * In addition to the aml code generated from this file, the + * src/acpi.c file creates a MEMNTFY method with an entry for each memdevice: + * Method(MTFY, 2) { + * If (LEqual(Arg0, 0x00)) { Notify(MP00, Arg1) } + * If (LEqual(Arg0, 0x01)) { Notify(MP01, Arg1) } + * ... + * } + * and a MEON array with the list of active and inactive memory devices: + * Name(MEON, Package() { One, One, ..., Zero, Zero, ... }) + */ +DefinitionBlock ("ssdt-mem.aml", "SSDT", 0x02, "BXPC", "CSSDT", 0x1) +/* v------------------ DO NOT EDIT ------------------v */ +{ + Device(MPAA) { + Name(ID, 0xAA) +/* ^------------------ DO NOT EDIT ------------------^ + * + * The src/acpi.c code requires the above layout so that it can update + * MPAA and 0xAA with the appropriate MEMDEVICE id (see + * SD_OFFSET_MEMHEX/MEMID1/MEMID2). Don't change the above without + * also updating the C code. + */ + Name(_HID, EISAID("PNP0C80")) + Name(_PXM, 0xAA) + + External(CMST, MethodObj) + External(MPEJ, MethodObj) + + Name(_CRS, ResourceTemplate() { + QwordMemory( + ResourceConsumer, + , + MinFixed, + MaxFixed, + Cacheable, + ReadWrite, + 0x0, + 0xDEADBEEF, + 0xE6ADBEEE, + 0x00000000, + 0x08000000, + ) + }) + Method (_STA, 0) { + Return(CMST(ID)) + } + Method (_EJ0, 1, NotSerialized) { + MPEJ(ID, Arg0) + } + } +} +