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| author | Peter Maydell <peter.maydell@linaro.org> | 2021-03-17 10:38:27 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-03-17 10:38:27 +0000 |
| commit | ff81439aafac58887b18032acd18a117f534cd75 (patch) | |
| tree | 18ccbd7e017e2802715131284ea1177c6cc894b7 /docs | |
| parent | 5d1428d6c43942cfb40a909e4c30a5cbb81bda8f (diff) | |
| parent | e1cecdca559d552bc5ab282696301858a97c3e8c (diff) | |
Merge remote-tracking branch 'remotes/vivier/tags/m68k-for-6.0-pull-request' into staging
m68k pull request 20210315
Add m68k virt machine
# gpg: Signature made Mon 15 Mar 2021 20:41:51 GMT
# gpg: using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg: issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg: aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg: aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F 5173 F30C 38BD 3F2F BE3C
* remotes/vivier/tags/m68k-for-6.0-pull-request:
m68k: add Virtual M68k Machine
m68k: add a system controller
m68k: add an interrupt controller
hw/intc: add goldfish-pic
hw/char: add goldfish-tty
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/specs/virt-ctlr.txt | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/docs/specs/virt-ctlr.txt b/docs/specs/virt-ctlr.txt new file mode 100644 index 0000000000..24d38084f7 --- /dev/null +++ b/docs/specs/virt-ctlr.txt @@ -0,0 +1,26 @@ +Virtual System Controller +========================= + +This device is a simple interface defined for the pure virtual machine with no +hardware reference implementation to allow the guest kernel to send command +to the host hypervisor. + +The specification can evolve, the current state is defined as below. + +This is a MMIO mapped device using 256 bytes. + +Two 32bit registers are defined: + +1- the features register (read-only, address 0x00) + + This register allows the device to report features supported by the + controller. + The only feature supported for the moment is power control (0x01). + +2- the command register (write-only, address 0x04) + + This register allows the kernel to send the commands to the hypervisor. + The implemented commands are part of the power control feature and + are reset (1), halt (2) and panic (3). + A basic command, no-op (0), is always present and can be used to test the + register access. This command has no effect. |