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312 commits

Author SHA1 Message Date
Hector Martin
aacbdf0949 GXF_STATUS -> GXF_STATUS_EL1 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-22 04:42:38 +09:00
Hector Martin
09cdebf08b gxf: Don't try to touch HCR_EL2 if GXF is enabled 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-22 03:21:01 +09:00
Hector Martin
76dca8c891 memory: Unbork EL0 execution 
We need to make m1n1 itself EL0-executable.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-22 02:48:17 +09:00
Hector Martin
da440672a8 uartproxy: Send events without copying data to a giant buffer 
We don't have 64K of stack.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-16 19:04:51 +09:00
Hector Martin
7abebaec88 iodev: Add iodev_queue() API to queue data without kicking transmission 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-16 19:04:51 +09:00
Mark Kettenis
9604907b2d pcie: minimal initialization 
Minimal initialization of the PCIe hardware such that the tunable
can be applied such that they don't have to be passed along in
the devicetree.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
 2021-05-16 02:43:44 +09:00
Hector Martin
28ab4e1611 hv_vm: Handle load/store instructions with update 
These don't get instruction syndromes, so we need to stop relying on
that to determine the access size.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 23:57:48 +09:00
Hector Martin
afc088840d hv: Add Python-side MMIO emulation hooks 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 23:57:48 +09:00
Hector Martin
323b02ce1d hv: Implement basic MMIO tracing to Python 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 23:57:48 +09:00
Hector Martin
a1f6b2502a usb_dwc3: Send a ZLP after multiple-of-512 transfers 
This fixes the stalling issue with readmem() of a multiple of 512 bytes.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 21:47:22 +09:00
Hector Martin
57708b529f usb_dwc3: Change xfer_in_progress to a bool 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 21:47:22 +09:00
Hector Martin
58489bf72c iodev, usb: Add flush() call to flush buffers to the host 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 21:47:22 +09:00
Hector Martin
67c7043b9a utils: In EL1, instead of rebooting, break into HV 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 20:42:50 +09:00
Hector Martin
03b70eed94 hv_vm: Move dprintf macro to utils.h, add more debugging 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 20:38:32 +09:00
Hector Martin
3de3b54b7e hv_asm: Restore all registers on return to guest 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 20:36:39 +09:00
Janne Grunau
a742f05532 usb/hv: add second CDC ACM interface for virtualized UART 
Signed-off-by: Janne Grunau <j@jannau.net>
 2021-05-15 19:47:08 +09:00
Sven Peter
4a893dc57a apple_regs: document more SPRR regs 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-05-15 16:38:45 +09:00
Hector Martin
5d3f154d0f hv_vm: Correctly split software mapped L2 blocks 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 01:28:44 +09:00
Hector Martin
bf34611bf4 hv_vm: Add out-of-bounds IPA check 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 01:15:17 +09:00
Hector Martin
e919b63a02 hv_vm: Add register-offset LDR/STR emulation, fix bugs 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-15 00:43:39 +09:00
Hector Martin
1a5ba2c67e hv_vm: Fix bad asserts 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-14 21:49:11 +09:00
Hector Martin
920ff59483 exception: Unbork EL1 stack 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-13 21:14:58 +09:00
Hector Martin
9efa91bf87 gxf: Do not disable the MMU around GXF calls 
We are now SPRR compatible.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-13 18:31:27 +09:00
Hector Martin
b9ed00c6f3 memory: Initialize SPRR permissions 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-13 18:16:56 +09:00
Hector Martin
8af8dadee1 memory: Support L3 mappings, map m1n1 code as RX. 
This replaces the old pagetable code with an adapted version of what
hv_vm.c does, which can handle block and page mappings more
intelligently.

Then, map the m1n1 code section as RX. This allows us to work in modes
where W^X is enforced.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-13 18:14:31 +09:00
Hector Martin
3e1ea2d503 memory: Add separate mappings for EL0 data access 
This unborks stack and constant pool accesses from el0_call.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-13 17:36:02 +09:00
Hector Martin
7685800b45 heapblock: Assert if not initialized 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-13 17:33:57 +09:00
Hector Martin
9ffab4ac98 hv_vm.c: Remove stray ; 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-13 17:33:48 +09:00
Sven Peter
1c604a77c5 gxf: add support for guarded exception levels 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-05-11 15:48:40 +09:00
Sven Peter
9120cb8426 memory: allow to reinit and temporarily disable the MMU 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-05-11 15:48:40 +09:00
Sven Peter
b00c5e6522 utils.h: add msr_sync convenience macros 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-05-11 15:48:40 +09:00
Sven Peter
36efdd2ac3 allow cpu_regs.h to be included in .S files 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-05-11 15:48:40 +09:00
Sven Peter
813e40f4ca exception_asm.S: skip msr hcr_el2 if not required 
When guarded exception levels are enabled hcr_el2 can no longer be written to from EL2.
A future commit will however use el1_call to jump to GL1. It will setup hcr_el2 before
enabling GXF such that the write doesn't have to happen in el1_call anymore

Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-05-11 15:48:40 +09:00
Sven Peter
148fe31122 exception_asm.S: correctly setup sp for EL1 
The previous code switched SPSel to EL0 but then used eret to
jump to EL1h which uses SP_EL1 instead

Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-05-11 15:48:40 +09:00
Hector Martin
ed32cf6328 hv_exc: Add a hacky STEP feature to interrupt guest after a while 
This should eventually be a proper single step feature or something, but
for now...

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-09 03:25:51 +09:00
Hector Martin
bcdafe8d00 hv_vm: Short-circuit hv_translate when MMU is off 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-09 03:25:51 +09:00
Hector Martin
8d5596a1a1 hv_vm: Fix bug when making L2 mappings 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-09 03:25:51 +09:00
Hector Martin
52823eaab6 hv_asm: Turn off PAN on exception entry 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-09 03:25:51 +09:00
Hector Martin
4c043a0f97 memory: Move SCTLR/TCR defines to arm_cpu_regs.h 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-09 03:25:51 +09:00
Hector Martin
0203aa6d3d proxy: Add framebuffer ops 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-08 03:42:21 +09:00
Hector Martin
aad892d461 fb: Implement fb_shutdown() & friends 
Clean up after ourselves before chainload

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-07 12:19:20 +09:00
Hector Martin
0ae3455d51 hv_vuart: World's stupidest virtual UART implementation 
Work in progress...

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-05 04:03:44 +09:00
Hector Martin
9407dba2e0 hv_vm: Initial data abort handling 
Supports software-mapping for a subset of ldr/str instructions.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-05 04:03:44 +09:00
Hector Martin
8a64441bcd hv_vm: Extend hv_translate() for stage1 and write modes 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-05 03:27:19 +09:00
Hector Martin
c0c7c57dd0 hv_vm: Fix bug inhv_pt_map_l4() 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-05 03:24:37 +09:00
Hector Martin
ce3a673413 uart: Move registers to uart_regs.h 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-05 03:23:25 +09:00
Hector Martin
27af846aae hv_vm.c: Move SPTE_TYPE to bit 50 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-05 03:23:04 +09:00
Hector Martin
0e987f031b utils: Add flush_and_reboot() to do the iodev flush dance 
Use this for exceptions, asserts, etc.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-05 03:21:48 +09:00
Hector Martin
50f112c396 hv: Add support for address translation & abort decoding 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-05 00:28:39 +09:00
Hector Martin
a3440f2b48 hv: Support cleanly exiting the hypervisor from an exception 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-05 00:28:39 +09:00
Hector Martin
d35fa5e0fc iodev: Add iodev_console_kick() 
This is used prior to rebooting in exception handlers, to make sure all
the exception dump data gets sent to USB if we are connected via that.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-05 00:28:39 +09:00
Hector Martin
4d64c33ca6 hv: Implement basic exception handling 
Allows Python to handle hypervisor exceptions, and implements exception
info display and basic debug commands.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-04 19:36:23 +09:00
Hector Martin
315fcf36aa uartproxy: Add support for nested invocations 
This allows the proxy to call back to Python for handling exceptions or
other events, passing reason information about why it was invoked and
returning normally when the exception has been handled.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-04 19:34:08 +09:00
Hector Martin
4cc0f45c9d arm_cpu_regs.h: Add SYS_ESR_EL2 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-04 19:25:46 +09:00
Hector Martin
785dba33ad exception_asm: Fix missing register restores 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-04 19:24:52 +09:00
Hector Martin
a326aca956 hv: Enable physical timer for EL1 properly 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-04 19:23:35 +09:00
Hector Martin
23304719cd hv: Move VM code to hv_vm.c 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-04 15:38:17 +09:00
Hector Martin
95542a4619 kboot: Handle missing CPUs properly 
This is necessary to boot Linux in UP mode if we're in EL1 and the HV
does not support SMP yet.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-04 01:52:58 +09:00
Hector Martin
9584e7d312 uartproxy: Add IODEV_WHOAMI feature to get current iodev 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-03 21:19:35 +09:00
Hector Martin
1ae60ad715 hv: Beginnings of a hypervisor 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-01 19:21:33 +09:00
Hector Martin
1ff5b82aab iodev/usb: Do not crash if USB was not initialized 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-01 19:04:38 +09:00
Hector Martin
68156fd806 utils.h: Add alignment and field macros 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-01 19:02:49 +09:00
Hector Martin
26c4ab3888 formatting: Sort main include first 
clang-format is supposed to do this, but for some reason it's "sticky"
and doesn't...

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-01 18:31:58 +09:00
Hector Martin
45a0054f63 Add build-time printf() argument checking and fix warnings 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-05-01 18:23:44 +09:00
Hector Martin
882610b50e cpu_regs.h: s/SYS_APL/SYS_IMP_APL/ to match Linux 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-29 15:45:44 +09:00
Hector Martin
c2e2094b95 usb_dwc3: Add missing space to product name string 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 19:10:41 +09:00
Hector Martin
7dfe24ee2c Rework kboot/chainload flow to shut down before calling the next stage 
Next stage boots now exit back to main() after replying to the proxy
command, allowing shutdown functions to be called. Introduces a new
P_VECTOR proxy op, distinct from P_CALL. The Python side is reworked
to remain compatible with older versions that do not support this.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 18:12:59 +09:00
Hector Martin
bcece01769 usb: Hook up to iodev and bring up after payload boot attempt 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 16:47:43 +09:00
Hector Martin
4f7ae843fa usb_dwc3: Fix read/write transfer pumping, add missing funcs 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 16:45:19 +09:00
Hector Martin
df9218582e usb_dwc3: Use new VID/PID 
Not official yet, PR:
https://github.com/pidcodes/pidcodes.github.com/pull/635/files

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 16:45:19 +09:00
Hector Martin
108f104e96 usb_dwc3: USB compliance improvements 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 16:45:19 +09:00
Hector Martin
fcdf2aede9 smp: Print success message on CPU#0 
SMP secondary prints only go to UART, so we need something on the main
CPU for other iodev consoles.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 16:45:19 +09:00
Hector Martin
34c1dc50ae iodev: Add iodev_handle_events() and iodev_console_flush() 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 16:45:19 +09:00
Hector Martin
d3957cc89d iodev: Fix error returns for iodev_read/write 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 16:45:19 +09:00
Hector Martin
565753980a iodev: Move primary core check into iodev, always use in_iodev logic 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 16:45:19 +09:00
Hector Martin
303118fd93 uartproxy: Convert to iodev 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 16:26:41 +09:00
Hector Martin
88e1612c09 uartproxy: s/CRCERR/CSUMERR/ and actually use it 
It's not a CRC.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-17 16:25:48 +09:00
Hector Martin
8104ec02c4 iodev: Add proxy ops 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-15 23:18:57 +09:00
Hector Martin
c8f59566eb fb: Remove unused enable/disable code 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-15 23:18:57 +09:00
Hector Martin
f8c1c65cf9 Revert "proxy: add fb console console ops" 
This reverts commit de0456b9a5.

These ops become redundant with the new iodev control op.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-15 23:18:57 +09:00
Hector Martin
cc4a5d312d iodev: Add new framework for I/O and console devices 
This replaces the earlier earlycon with a single shared console buffer
for all output devices.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-15 23:18:57 +09:00
Hector Martin
1c518ded09 types.h: Include stdbool.h, define ssize_t 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-15 23:18:57 +09:00
Hector Martin
d63e84d2f7 fb: add fb_console_reserve_lines() 
This is like fb_console_scroll(), but only scrolls if necessary to
ensure that enough free space is available at the end of the console.
This avoids spuriously scrolling during shutdown if we still have space.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-15 23:18:57 +09:00
Hector Martin
151c601b2a Revert "fb: add earlycon to capture messages before fb_init" 
This is being replaced with a global buffer in iodev.

This reverts commit 5d4067642e.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-15 23:18:57 +09:00
Sven Peter
add04246e7 usb: add clock/power/phy bringup 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-15 18:39:33 +09:00
Sven Peter
59ba266b11 usb: add DWC3 CDC ACM code 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-15 18:39:33 +09:00
Sven Peter
ea362ea8f9 ringbuffer: add a simple ringbuffer data structure 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-15 18:39:33 +09:00
Sven Peter
00e862238c usb: add usb_types.h 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-15 18:39:33 +09:00
Sven Peter
50afcd1ffe usb: add more registers and removed linux-specific code from usb_dwc3_regs.h 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-15 18:39:33 +09:00
Sven Peter
ac13c3b17f usb: add drivers/usb/dwc3/core.h from linux 
This file is taken from commit 7bc5a6ba369217e0137833f5955cf0b0f08b0712 before
the license was changed to GPLv2-only.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/usb/dwc3/core.h?id=7bc5a6ba369217e0137833f5955cf0b0f08b0712

core.h is copyright:
  Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
  Authors: Felipe Balbi <balbi@ti.com>,
	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
and dual-licensed under the GPLv2 and BSD3.

Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-15 18:39:33 +09:00
Sven Peter
17fdc79c13 utils.h: add mdelay 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-15 18:39:33 +09:00
Sven Peter
35007b700e proxy: add dart ops 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-15 01:36:29 +09:00
Sven Peter
de0456b9a5 proxy: add fb console console ops 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-14 18:11:37 +09:00
Sven Peter
5d4067642e fb: add earlycon to capture messages before fb_init 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-14 18:11:37 +09:00
Sven Peter
2873aed75a memory: speed hack: scroll fb console before shutting down the MMU 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-14 18:11:37 +09:00
Sven Peter
fd2deed39b fb: add framebuffer console 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-14 18:11:37 +09:00
Sven Peter
819b16fbe4 fb.c: minor cleanup 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-14 18:11:37 +09:00
Sven Peter
05e7306bf9 fb console: add Source Code Pro font 
This font is licensed under the OFL-1.1 License and copyright:

Copyright 2010-2019 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'.
All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.

Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-14 18:11:37 +09:00
Sven Peter
f80933a7d3 utils.h: add is_primary_core 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-14 18:11:37 +09:00
Sven Peter
1a04590ed3 utils.h: add min and max 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-14 18:11:37 +09:00
Hector Martin
9fc3f0c230 exception: Print exception context for FIQ 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-14 17:48:02 +09:00
Hector Martin
0df6db324b timer_test.py: More exhaustive tests 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-04-14 17:48:02 +09:00
Sven Peter
8efff1b0ab dart: add code to setup the DART iommu 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-14 17:40:07 +09:00
Sven Peter
1e247107aa types: add SZ_2K/SZ_16K/SZ_1M 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-14 17:40:07 +09:00
Sven Peter
1314a426e2 proxyclient: add PMGR ops 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-11 05:26:29 +09:00
Sven Peter
b31e1265ff pmgr: add functions to enable/disable clocks 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-11 05:26:29 +09:00
Sven Peter
95b1cb39fc utils.h: add poll32 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-11 05:26:29 +09:00
Sven Peter
bf3830ee6d utils.h: add dma_mb,dma_rmb,dma_wmb 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-11 05:26:29 +09:00
Sven Peter
8aa3c69a2d tunables: add tunables_apply_local_addr 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-08 20:32:12 +09:00
Sven Peter
a17e64f1e2 tunables: add proxy ops 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-08 20:32:12 +09:00
Sven Peter
d73276b0bc tunables: add initial version. 
There are at least two types in the ADT related to USB,
but there's a decent chance that there are even more
required for other devices:

 * A simple tunable that applies to a whole device node
   and all its MMIO ranges specified in the "reg" property.
   This one seems to just be mask32.

 * A slightly more complex tunable that applies to a single
   MMIO range specified in the "reg" property. So far I've
   only seen 32 bit masks but the format looks like it should
   also support 8,16 and 64 bit masks.

Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-04-08 20:32:12 +09:00
Hector Martin
35f2b2435e kboot: reserve m1n1 in memory 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-03-15 02:26:13 +09:00
Hector Martin
efa4452a47 Fix libc header dependencies 
Turns out we had a bunch of silly dependencies on libc headers that are
not included with freestanding compilers. Fix all this and change the
CFLAGS to exclude libc headers and only include the built-in compiler
path.

Add our own versions of assert.h, errno.h, limits.h, and move malloc.h
and string.h together into a new path used as -isystem, so these headers
can be included using #include <>.

Remove a bunch of other dependencies in third-party code.

Add a strnlen function.

Disable building the libfdt overlay code for now, as it needs a strtoul
implementation. We can throw that in if/when we decide to use overlays.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-03-08 01:31:14 +09:00
Hector Martin
ce2038c59c memory: use tlbi vmalle1is 
This works at both EL1 and EL2(with VHE) and seems to do the right
thing.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-03-04 22:39:26 +09:00
Hector Martin
b8349819fe Implement calling code as EL1 
This works by clearing HCR_EL2.TGE, and then doing essentially the same
thunk/return dance as for EL0 calls. However, since most EL1 exceptions
are not routed to EL2, we install hypercall vectors in EL1 to forward
them to EL2, and then short circuit the exception return to whatever
triggered the original exception.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-03-04 22:10:37 +09:00
Hector Martin
f669237c2a start.S: clean up some junk 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-03-04 21:27:25 +09:00
Hector Martin
16cff51bd4 exception,memory: s/EL2/EL1/ 
Since we're in VHE mode, we can pretend to be in EL1 - but this will
allow us to really run in EL1 if we want to in the future.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-03-04 20:31:36 +09:00
Hector Martin
4282cd0578 exception: size tables properly, work around overeager clang-format 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-03-04 19:52:53 +09:00
Hector Martin
d5acb000f2 kboot: add support for KASLR and bootloader randomness 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-03-04 19:47:39 +09:00
Hector Martin
8e4b99d75a memory: reformat and shorten MAIR_INDEX to MAIR_IDX 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-03-04 19:47:37 +09:00
Hector Martin
3872b1a7da exception: implement el0_call to run code as EL0 
This lets us test register access and other features from EL0.

No serious attempt at security is made, but at least EL0 runs off of a
separate stack and can return to EL2 at any time with `brk`; we can
easily implement a guard mode to break straight to EL2 on exception
later if needed.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-24 21:48:12 +09:00
Hector Martin
73a85be2b8 memory: prepare for EL0 support 
Enable EL0 access to MMIO/etc, but not main RAM, because AArch64
architecturally enforces EL0w ^ EL2x.

Instead, create an alias of main RAM to grant EL0 full permissions,
at 0x80_0000_0000.

Grant EL0 full access to MMIO stuff, since EL2 will never execute
from there.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-24 21:48:12 +09:00
Hector Martin
b5cbf7360e exception: handle PMC FIQs 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-18 17:55:55 +09:00
Hector Martin
cf640de6db utils.h: add BIT() macro 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-18 17:55:55 +09:00
Hector Martin
17aca31498 utils.h: move reg_{clr,set,mask} here from chickens.c 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-18 17:55:55 +09:00
Hector Martin
86a7d9c0f3 cpu_regs.h: s/SYS_/SYS_APL_/ 
This synchronizes the register naming convention with Linux

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-18 17:55:55 +09:00
Sven Peter
f3eed1c7d7 MMU: correctly map MMIO/PCIe ranges 
Previously all MMIO was mapped twice with different attributes
which may or may not lead to strange behaviour when the same
physical range is accessed from both mappings.

We now have a better idea which ranges require nGnRE and nGnRnE
and can just do it correctly instead.

Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-02-18 16:16:55 +09:00
Sven Peter
870fead39c proxyclient: add ops for writeread{8,16,32,64} 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-02-18 16:12:28 +09:00
Sven Peter
1ccf2e2af5 utils.h: add writeread{8,16,32,64} 
These functions all perform a store direcly followed by a load.
This is useful to e.g. useful to find busy bits which might
already be cleared a few cycles after a write.

Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-02-18 16:12:28 +09:00
Sven Peter
24938db17a MMU: use alle2 instead of vmalls12e1is to invalidate TLBs 
I can't remember why I used vmalls12e1is but this leads to
the following bug:

  1. Load m1n1 with normal MMU setup
  2. Disable all mappings, recompile and chainload to that m1n1
  3. Everything will work fine for a while even though it should explode
     when enabling the MMU.

This happens becuse there are still stale TLB entries in some cache.

Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-02-15 01:37:39 +09:00
Hector Martin
d46d51d7ed exception: fix vtimer FIQ masking 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-11 01:35:23 +09:00
Hector Martin
063b9a1d27 exception: Add GUARD_SILENT feature to suppress logs 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-11 00:55:59 +09:00
Hector Martin
eab71ee92b fb, kboot: handle Retina flag correctly 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-06 22:27:45 +09:00
Hector Martin
5dbc82a9ee payload: add support for booting in-line payloads 
Usage:

$ cat m1n1.macho Image.gz apple-j274.dtb initramfs.gz \
    > m1n1-payload.macho

That's it.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-06 16:44:10 +09:00
Hector Martin
93bad96311 minilzlib: fix support for non-CRC32 checksum types 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-06 16:44:10 +09:00
Hector Martin
61e2c36ef5 tinf, minzllib: support unknown input sizes 
This can be used when the input file size is unknown: the decompression
functions will keep track of it and return it to the caller instead.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-06 16:44:10 +09:00
Hector Martin
0cd328214c exception: handle all 4 available timer FIQs 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-06 16:44:10 +09:00
Hector Martin
5aff13c404 proxy: add missing SPDX header 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-06 16:44:10 +09:00
Hector Martin
5e5627cd0b clang-format: Add include block configs, reformat 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-06 16:44:10 +09:00
Ariel Machado
476182e1f8 utils.h: Fix 'asm-operand-widths' warnings with clang 
Signed-off-by: Ariel Machado <ariel@fe.up.pt>
 2021-02-06 12:13:29 +09:00
Hector Martin
8691fcee8a kboot: fix fb debug print 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-05 03:49:20 +09:00
Hector Martin
234a511e35 kboot: add spin-table and SMP support 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-05 02:58:08 +09:00
Hector Martin
aaab2c6ca1 chickens: set WFI mode to clockgate only 
This preserves CPU registers.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-05 02:58:08 +09:00
Hector Martin
e35ef6eb8c smp: fix IRQs on secondary CPUs 
Seems one of the registers is some kind of system-level CPU spinup flag,
without which the CPU runs but the rest of the system thinks it's still
dead.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-05 02:58:08 +09:00
Hector Martin
cb7e7f7918 exception.c: print MPIDR with IRQs 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-02-05 02:58:08 +09:00
Hector Martin
96d133e854 mmu: map device memory as non-executable 
This fixes the random SErrors after returning from a page fault. Turns
out the M1 was randomly deciding to speculate an instruction fetch from
address 0, triggering a fabric error.

Quoting the ARM ARM:

"Hardware does not prevent speculative instruction fetches from a memory
location with any of the Device memory attributes unless the memory
location is also marked as Execute-never for all Exception levels.

This means that to prevent speculative instruction fetches from memory
locations with Device memory attributes, any location that is assigned
any Device memory type must also be marked as execute-never for all
Exception levels. Failure to mark a memory location with any Device
memory attribute as execute-never for all Exception levels is a
programming error."

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-31 13:42:48 +09:00
Hector Martin
b65e2ca0e4 mmu: also set up high-VA translation 
Just an alias

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
b2ef461114 get rid of another warning pragma 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
919e3fb64a exception: use 64bit print types 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
65c0632ae7 exception: do not reboot on SError 
This may or may not go well depending on the problem... but let's see
what happens.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00