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Author SHA1 Message Date
Achilleas Anagnostopoulos
d180348116 Define DriverInfo and registration helpers 2017-07-18 08:23:43 +01:00
Achilleas Anagnostopoulos
a86a1bd8cd Merge pull request #46 from boomshroom/patch-1 
Check grub on non-dpkg systems.
 2017-07-17 07:36:30 +01:00
me
93e2985473 Check grub on non-dpkg systems. 
Also makes checking for grub-mkrescure more in line with the check for xorriso.
 2017-07-16 21:32:25 -07:00
Achilleas Anagnostopoulos
37e32d9960 Provide correct implementation for cpu.FlushTLBEntry 
The previous version worked under qemu (or qemu does not implement TLB
caching) but caused an unrecoverable page fault when running under
virtualbox.
 2017-07-15 17:25:04 +01:00
Achilleas Anagnostopoulos
a05c135355 Merge pull request #45 from achilleasa/enable-support-for-defer 
Enable support for defer
 2017-07-14 08:11:37 +01:00
Achilleas Anagnostopoulos
66d471f442 Defer kernel panic when Kmain returns 2017-07-14 08:05:59 +01:00
Achilleas Anagnostopoulos
ccba8877ce Enable support for deferred calls 2017-07-14 08:05:54 +01:00
Achilleas Anagnostopoulos
9567f259bd Set m.curg = g0 2017-07-14 07:45:56 +01:00
Achilleas Anagnostopoulos
bc52b65615 Merge pull request #44 from achilleasa/implement-vesa-fb-console-driver 
Implement vesa fb console driver with support for bitmap fonts and logos
 2017-07-14 06:16:52 +01:00
Achilleas Anagnostopoulos
16ad4c856e Set framebuffer tag in multiboot header and add vesa grub menu entries 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
eaeae85600 Implement LogoSetter interface for vesa fb driver 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
c7fc9f0ac9 Add gopher logos (64, 96 and 128 pixels tall) 
The gopher images were obtained from: https://github.com/golang-samples/gopher-vector
 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
4af2ed62a0 Display the best-fit logo on logo-capable console devices 
Logos can be disabled by passing the "consoleLogo=off" boot command line
parameter.
 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
cb7ae66556 Define LogoSetter interface and BestFit selection helper 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
a5c6828fc2 Create tool for converting images to compatible console logo files 
The tool processes an image and converts it to a logo.Image struct which
can be assigned to a logo-capable console.
 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
99977294aa Disable bounds-checking for release builds and use std vga with qemu 
By passing "-std vga" to qemu we can access all sorts of useful
resolutions for testing the kernel (e.g 2560x1600x32)
 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
540f288e61 Select appropriate font for console devices with font support 
The hal package automatically selects the best font from the list of
available fonts based on the console dimensions and the font priorities. The font
selection can be overriden by passing the "consoleFont" boot commandline
parameter to the kernel (e.g. consoleFont=terminus8x16)
 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
d71c4c1eea Add 8x16, 10x18 and 14x28 fonts based on the terminus font 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
72feb11acb Document exported symbols 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
f4f3745073 Extend vesa driver support to 15 and 16bpp framebuffers 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
f02c767257 Extend vesa driver to support 24 and 32 bpp 2017-07-13 23:35:20 +01:00
Achilleas Anagnostopoulos
13ba4bbbed Implement vesa console driver for 8bpp framebuffers 2017-07-13 23:35:10 +01:00
Achilleas Anagnostopoulos
cbf0c82702 Change Dimensions() signature to support querying for characters or pixels 2017-07-13 22:06:50 +01:00
Achilleas Anagnostopoulos
952d0bf4a5 Define FontSetter interface, the Font type and helper methods 
The helper methods provide support for selecting the best-fit font for
the console dimensions and for looking up a font by name.
 2017-07-13 22:06:50 +01:00
Achilleas Anagnostopoulos
4e5cee30ba Merge pull request #43 from achilleasa/setup-granular-pdt-for-kernel 
Setup granular PDT for kernel
 2017-07-13 06:57:01 +01:00
Achilleas Anagnostopoulos
6195f3fc3b Setup a more granular PDT based on the ELF image section addresses 2017-07-13 06:35:22 +01:00
Achilleas Anagnostopoulos
cc4364f55c Pass the virtual page offset for the kernel to kernel.Kmain 
Ths page offset is defined in arch/XXX/constants.inc and needs to be
passed to the kernel so we can correctly calculate the physical frame
addresses that correspond to the ELF section virtual memory addresses.
 2017-07-13 00:08:40 +01:00
Achilleas Anagnostopoulos
a2d58f8949 Switch to a visitor-based no-alloc implementation for fetching ELF sections 
This change is required as the code to create a new PDT should execute
before the Go allocator is bootstrapped.
 2017-07-13 00:08:40 +01:00
Achilleas Anagnostopoulos
fdd5611220 Fix bug in the ASM code used to load the PDT to the CR2 register 
The previous implementation in Go assembly did not translate to the
correct assembly instructions for loading CR2
 2017-07-13 00:08:40 +01:00
Achilleas Anagnostopoulos
4e0ad81770 Reload GDT with the descriptor VMA once the CPU switches to 64-bit mode 
The GDT is initially loaded in the 32-bit rt0 code where we cannot use
the 48-bit VMA for the GDT table and instead we use its physical
address. This approach works as the rt0 code establishes an identity
mapping for the region 0-8M. However, when the kernel creates a more
granular PDT it only includes the VMA addresses for the kernel ELF image
sections making the 0-8M invalid. Unless the GDT is reloaded with the
VMA of the table, the CPU will cause a non-recoverable page fault when
it tries to restore the segment registers while returning from a
recoverable page fault.
 2017-07-13 00:08:40 +01:00
Achilleas Anagnostopoulos
9d2e53bac4 Redirect runtime.init to an empty stub 2017-07-13 00:08:35 +01:00
Achilleas Anagnostopoulos
8a0fd0ade4 Merge pull request #42 from achilleasa/parse-additional-multiboot-tags 
Parse additional multiboot tags
 2017-07-10 19:23:44 +01:00
Achilleas Anagnostopoulos
a79be7c268 Support parsing of 64-bit ELF section tags off from the multiboot data 2017-07-10 19:08:28 +01:00
Achilleas Anagnostopoulos
af9613e336 Support extraction of boot cmdline off the multiboot data 2017-07-10 19:05:49 +01:00
Achilleas Anagnostopoulos
5ef344010b Support parsing of framebuffer color info out of the multiboot data 2017-07-10 19:05:01 +01:00
Achilleas Anagnostopoulos
86609fea06 Merge pull request #40 from achilleasa/map-vga-text-fb 
Map vga text console framebuffer
 2017-07-08 22:25:49 +01:00
Achilleas Anagnostopoulos
13ef4cd08d Map physical address of the vga text console framebuffer in DriverInit 
Currently, the kernel can write to 0xb80000 because this is part of the
initial identify mapping set up by the rt0 code. When we establish new
mappings for the kernel using its real VMA address then writes to the
framebuffer will cause a page fault unless we explicitly map it.
 2017-07-08 22:18:24 +01:00
Achilleas Anagnostopoulos
8ac2ba82cc Implement function for mapping a contiguous physical memory region 
The MapRegion function can be used by device drivers to ensure that they
can access memory mapped by the various devices.
 2017-07-08 22:17:34 +01:00
Achilleas Anagnostopoulos
42e6802323 Merge pull request #39 from achilleasa/enhance-hal-output-log 
Enhance hal output log
 2017-07-08 22:15:06 +01:00
Achilleas Anagnostopoulos
1b697fd125 Pass PrefixWriter with driver name and version to DriverInit calls 2017-07-08 22:09:19 +01:00
Achilleas Anagnostopoulos
3485523cdc Update the Driver.DriverInit method signature to accept an io.Writer 
Drivers can use the writer as an argument to kfmt.Fprintf to log
additional output during their initialization.
 2017-07-08 22:09:19 +01:00
Achilleas Anagnostopoulos
da279cf3ff Implement PrefixWriter 
PrefixWriter is a passthrough io.Writer that prepends a prefix to the
beginning of each line.
 2017-07-08 22:09:13 +01:00
Achilleas Anagnostopoulos
b1084c1362 Fix broken unit tests 2017-07-08 13:02:15 +01:00
Achilleas Anagnostopoulos
ffb8f86a9c Each driver should manually register a probe function for use by hal 
This commit removes the HWProbes() function from the console and tty
packages and replaces it with a global ProbeFuncs slice which is fetched
by the hal package when the hardware autodetection code runs.

Each driver should provide an init() function that appends a probe function
to the global ProbeFuncs slice.

This approach allows us to support conditional compilation of drivers in
the future (e.g. using build tags)
 2017-07-08 12:26:40 +01:00
Achilleas Anagnostopoulos
4845f7a4ca Use uint32 instead of uint16 for TTY coordinates 2017-07-08 12:26:40 +01:00
Achilleas Anagnostopoulos
fd3ca91138 Use uint32 for console coordinates and fix dimension bug 2017-07-08 12:26:40 +01:00
Achilleas Anagnostopoulos
d804b17ed8 Merge pull request #38 from achilleasa/refactor-console-and-tty-drivers 
Refactor console and tty drivers
 2017-07-07 21:44:15 +01:00
Achilleas Anagnostopoulos
562fae2028 Detect hw and wire active console and TTY 2017-07-07 21:37:00 +01:00
Achilleas Anagnostopoulos
eca1f6c26e Change early.Printf calls to kfmt.Printf 2017-07-07 21:37:00 +01:00
Achilleas Anagnostopoulos
545a18fccc Support pluggable output sinks for Printf with a ring-buffer fallback 
The implementation of Printf has been moved from the early package to
the kfmt package. The dependency to ActiveTerminal has been removed and
the code now uses an io.Writer for its output. As Go interfaces cannot
be used before bootstrapping the Go runtime, the code uses a ring-buffer
fallback for storing any kernel output emitted before that point.
 2017-07-07 21:37:00 +01:00