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@xxxxxxxxxxxxxxxx>
---
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)
+ }
+ }
+}
+
--
1.7.9
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