[project] Clean up src/ tree

A long overdue cleanup of the src/ tree.

- Moved src/drivers to src/user because it contains more than drivers
- Removed src/drivers/ahci because it's unused - will restore it when I
  make a real AHCI driver
- Removed unused src/tools
- Moved kernel.ld (the only used file under src/arch) to src/kernel for
  now, if/when there's a multi-platform effort that should be figured
  out as part of it
- Removed the rest of the unused src/arch
- Renamed 'fb' to 'drv.uefi_fb' and 'nulldrv' to 'testapp'
This commit is contained in:
Justin C. Miller
2021-07-25 23:47:23 -07:00
parent ec9e34c970
commit 269324c553
34 changed files with 10 additions and 1471 deletions

View File

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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x08, 0x00, 0x3c, 0x42, 0x42,
0x7e, 0x40, 0x40, 0x3e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x24, 0x00,
0x00, 0x3c, 0x42, 0x42, 0x7e, 0x40, 0x40, 0x3e, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x24, 0x24, 0x00, 0x3c, 0x42, 0x42, 0x7e, 0x40, 0x40, 0x3e,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x08, 0x00, 0x38, 0x08, 0x08,
0x08, 0x08, 0x08, 0x3e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x08,
0x00, 0x38, 0x08, 0x08, 0x08, 0x08, 0x08, 0x3e, 0x00, 0x00, 0x00, 0x00,
0x00, 0x18, 0x24, 0x00, 0x00, 0x38, 0x08, 0x08, 0x08, 0x08, 0x08, 0x3e,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x24, 0x24, 0x00, 0x38, 0x08, 0x08,
0x08, 0x08, 0x08, 0x3e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x06, 0x1a,
0x01, 0x1d, 0x23, 0x41, 0x41, 0x41, 0x22, 0x1c, 0x00, 0x00, 0x00, 0x00,
0x00, 0x32, 0x4c, 0x00, 0x00, 0x7c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x08, 0x00, 0x3c, 0x42, 0x42,
0x42, 0x42, 0x42, 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x08,
0x00, 0x3c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3c, 0x00, 0x00, 0x00, 0x00,
0x00, 0x18, 0x24, 0x00, 0x00, 0x3c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3c,
0x00, 0x00, 0x00, 0x00, 0x00, 0x32, 0x4c, 0x00, 0x00, 0x3c, 0x42, 0x42,
0x42, 0x42, 0x42, 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x24, 0x24,
0x00, 0x3c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3c, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x18, 0x18,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x3c, 0x46, 0x4a,
0x52, 0x62, 0x42, 0x3c, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x10,
0x00, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3e, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x04, 0x08, 0x00, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3e,
0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x24, 0x00, 0x00, 0x42, 0x42, 0x42,
0x42, 0x42, 0x42, 0x3e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x24, 0x24,
0x00, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3e, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x04, 0x08, 0x00, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3e,
0x02, 0x02, 0x3c, 0x00, 0x00, 0x00, 0x40, 0x40, 0x40, 0x5c, 0x62, 0x41,
0x41, 0x41, 0x62, 0x5c, 0x40, 0x40, 0x40, 0x00, 0x00, 0x00, 0x24, 0x24,
0x00, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3e, 0x02, 0x02, 0x3c, 0x00,
0xff, 0xff, 0xe2, 0x96, 0x92, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc2, 0xb0,
0xff, 0xff, 0xff, 0xff, 0xe2, 0x94, 0x98, 0xff, 0xe2, 0x94, 0x90, 0xff,
0xe2, 0x94, 0x8c, 0xff, 0xe2, 0x94, 0x94, 0xff, 0xe2, 0x94, 0xbc, 0xff,
0xff, 0xff, 0xe2, 0x94, 0x80, 0xff, 0xff, 0xff, 0xe2, 0x94, 0x9c, 0xff,
0xe2, 0x94, 0xa4, 0xff, 0xe2, 0x94, 0xb4, 0xff, 0xe2, 0x94, 0xac, 0xff,
0xe2, 0x94, 0x82, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc2, 0xa3, 0xff, 0xff,
0x20, 0xff, 0x21, 0xff, 0x22, 0xff, 0x23, 0xff, 0x24, 0xff, 0x25, 0xff,
0x26, 0xff, 0x27, 0xff, 0x28, 0xff, 0x29, 0xff, 0x2a, 0xff, 0x2b, 0xff,
0x2c, 0xff, 0x2d, 0xff, 0x2e, 0xff, 0x2f, 0xff, 0x30, 0xff, 0x31, 0xff,
0x32, 0xff, 0x33, 0xff, 0x34, 0xff, 0x35, 0xff, 0x36, 0xff, 0x37, 0xff,
0x38, 0xff, 0x39, 0xff, 0x3a, 0xff, 0x3b, 0xff, 0x3c, 0xff, 0x3d, 0xff,
0x3e, 0xff, 0x3f, 0xff, 0x40, 0xff, 0x41, 0xff, 0x42, 0xff, 0x43, 0xff,
0x44, 0xff, 0x45, 0xff, 0x46, 0xff, 0x47, 0xff, 0x48, 0xff, 0x49, 0xff,
0x4a, 0xff, 0x4b, 0xff, 0x4c, 0xff, 0x4d, 0xff, 0x4e, 0xff, 0x4f, 0xff,
0x50, 0xff, 0x51, 0xff, 0x52, 0xff, 0x53, 0xff, 0x54, 0xff, 0x55, 0xff,
0x56, 0xff, 0x57, 0xff, 0x58, 0xff, 0x59, 0xff, 0x5a, 0xff, 0x5b, 0xff,
0x5c, 0xff, 0x5d, 0xff, 0x5e, 0xff, 0x5f, 0xff, 0x60, 0xff, 0x61, 0xff,
0x62, 0xff, 0x63, 0xff, 0x64, 0xff, 0x65, 0xff, 0x66, 0xff, 0x67, 0xff,
0x68, 0xff, 0x69, 0xff, 0x6a, 0xff, 0x6b, 0xff, 0x6c, 0xff, 0x6d, 0xff,
0x6e, 0xff, 0x6f, 0xff, 0x70, 0xff, 0x71, 0xff, 0x72, 0xff, 0x73, 0xff,
0x74, 0xff, 0x75, 0xff, 0x76, 0xff, 0x77, 0xff, 0x78, 0xff, 0x79, 0xff,
0x7a, 0xff, 0x7b, 0xff, 0x7c, 0xff, 0x7d, 0xff, 0x7e, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc2, 0xa0, 0xff, 0xc2, 0xa1,
0xff, 0xc2, 0xa2, 0xff, 0xc2, 0xa3, 0xff, 0xc2, 0xa4, 0xff, 0xc2, 0xa5,
0xff, 0xc2, 0xa6, 0xff, 0xff, 0xc2, 0xa8, 0xff, 0xc2, 0xa9, 0xff, 0xff,
0xc2, 0xab, 0xff, 0xff, 0xc2, 0xad, 0xff, 0xff, 0xff, 0xc2, 0xb0, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc2, 0xb8, 0xff, 0xff, 0xff,
0xc2, 0xbb, 0xff, 0xff, 0xff, 0xff, 0xc2, 0xbf, 0xff, 0xc3, 0x80, 0xff,
0xc3, 0x81, 0xff, 0xc3, 0x82, 0xff, 0xc3, 0x83, 0xff, 0xc3, 0x84, 0xff,
0xc3, 0x85, 0xff, 0xc3, 0x86, 0xff, 0xc3, 0x87, 0xff, 0xc3, 0x88, 0xff,
0xc3, 0x89, 0xff, 0xc3, 0x8a, 0xff, 0xc3, 0x8b, 0xff, 0xc3, 0x8c, 0xff,
0xc3, 0x8d, 0xff, 0xc3, 0x8e, 0xff, 0xc3, 0x8f, 0xff, 0xc3, 0x90, 0xff,
0xc3, 0x91, 0xff, 0xc3, 0x92, 0xff, 0xc3, 0x93, 0xff, 0xc3, 0x94, 0xff,
0xc3, 0x95, 0xff, 0xc3, 0x96, 0xff, 0xc3, 0x97, 0xff, 0xc3, 0x98, 0xff,
0xc3, 0x99, 0xff, 0xc3, 0x9a, 0xff, 0xc3, 0x9b, 0xff, 0xc3, 0x9c, 0xff,
0xc3, 0x9d, 0xff, 0xc3, 0x9e, 0xff, 0xc3, 0x9f, 0xff, 0xc3, 0xa0, 0xff,
0xc3, 0xa1, 0xff, 0xc3, 0xa2, 0xff, 0xc3, 0xa3, 0xff, 0xc3, 0xa4, 0xff,
0xc3, 0xa5, 0xff, 0xc3, 0xa6, 0xff, 0xc3, 0xa7, 0xff, 0xc3, 0xa8, 0xff,
0xc3, 0xa9, 0xff, 0xc3, 0xaa, 0xff, 0xc3, 0xab, 0xff, 0xc3, 0xac, 0xff,
0xc3, 0xad, 0xff, 0xc3, 0xae, 0xff, 0xc3, 0xaf, 0xff, 0xc3, 0xb0, 0xff,
0xc3, 0xb1, 0xff, 0xc3, 0xb2, 0xff, 0xc3, 0xb3, 0xff, 0xc3, 0xb4, 0xff,
0xc3, 0xb5, 0xff, 0xc3, 0xb6, 0xff, 0xc3, 0xb7, 0xff, 0xc3, 0xb8, 0xff,
0xc3, 0xb9, 0xff, 0xc3, 0xba, 0xff, 0xc3, 0xbb, 0xff, 0xc3, 0xbc, 0xff,
0xc3, 0xbd, 0xff, 0xc3, 0xbe, 0xff, 0xc3, 0xbf, 0xff

View File

@@ -0,0 +1,80 @@
#include <assert.h>
#include "font.h"
/* PSF2 header format
* Taken from the Linux KBD documentation
* http://www.win.tue.nl/~aeb/linux/kbd/font-formats-1.html
*/
const static uint8_t magic[] = {0x72, 0xb5, 0x4a, 0x86};
const static uint32_t max_version = 0;
const static uint8_t unicode_sep = 0xff;
const static uint8_t unicode_start = 0xfe;
/* bits used in flags */
enum psf2_flags {
psf2_has_unicode = 0x00000001
};
struct psf2_header {
uint8_t magic[4];
uint32_t version;
uint32_t header_size; // offset of bitmaps in file
uint32_t flags;
uint32_t length; // number of glyphs
uint32_t charsize; // number of bytes for each character
uint32_t height, width; // max dimensions of glyphs
};
const uint8_t default_font[] = {
// xxd -i < font_file.psf > default_font.inc
#include "default_font.inc"
};
font::font(void const *data) :
m_sizex {0},
m_sizey {0},
m_count {0},
m_data {nullptr}
{
if (!data)
data = default_font;
psf2_header const *psf2 = static_cast<psf2_header const *>(data);
for (int i = 0; i < sizeof(magic); ++i) {
assert(psf2->magic[i] == magic[i] && "Bad font magic number.");
}
m_data = static_cast<uint8_t const *>(data) + psf2->header_size;
m_sizex = psf2->width;
m_sizey = psf2->height;
m_count = psf2->length;
}
void
font::draw_glyph(
screen &s,
uint32_t glyph,
screen::pixel_t fg,
screen::pixel_t bg,
unsigned x,
unsigned y) const
{
unsigned bwidth = (m_sizex+7)/8;
uint8_t const *data = m_data + (glyph * glyph_bytes());
for (int dy = 0; dy < m_sizey; ++dy) {
for (int dx = 0; dx < bwidth; ++dx) {
uint8_t byte = data[dy * bwidth + dx];
for (int i = 0; i < 8; ++i) {
if (dx*8 + i >= m_sizex) break;
const uint8_t mask = 1 << (7-i);
uint32_t c = (byte & mask) ? fg : bg;
s.draw_pixel(x + dx*8 + i, y + dy, c);
}
}
}
}

View File

@@ -0,0 +1,33 @@
#pragma once
#include <stdint.h>
#include "screen.h"
class font
{
public:
/// Constructor.
/// \arg data The font data to load. If null, will load the default
/// built-in font.
font(void const *data = nullptr);
unsigned glyph_bytes() const { return m_sizey * ((m_sizex + 7) / 8); }
unsigned count() const { return m_count; }
unsigned width() const { return m_sizex; }
unsigned height() const { return m_sizey; }
bool valid() const { return m_count > 0; }
void draw_glyph(
screen &s,
uint32_t glyph,
screen::pixel_t fg,
screen::pixel_t bg,
unsigned x,
unsigned y) const;
private:
unsigned m_sizex, m_sizey;
unsigned m_count;
uint8_t const *m_data;
};

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@@ -0,0 +1,139 @@
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include "j6/init.h"
#include "j6/errors.h"
#include "j6/flags.h"
#include "j6/signals.h"
#include "j6/syscalls.h"
#include "j6/types.h"
#include "font.h"
#include "screen.h"
#include "scrollback.h"
extern "C" {
int main(int, const char **);
void _get_init(size_t *initc, struct j6_init_value **initv);
}
extern j6_handle_t __handle_sys;
extern j6_handle_t __handle_self;
struct entry
{
uint8_t bytes;
uint8_t area;
uint8_t severity;
uint8_t sequence;
char message[0];
};
int
main(int argc, const char **argv)
{
j6_system_log("fb driver starting");
size_t initc = 0;
j6_init_value *initv = nullptr;
_get_init(&initc, &initv);
j6_init_framebuffer *fb = nullptr;
for (unsigned i = 0; i < initc; ++i) {
if (initv[i].type == j6_init_desc_framebuffer) {
fb = reinterpret_cast<j6_init_framebuffer*>(initv[i].data);
break;
}
}
if (!fb || fb->addr == 0) {
j6_system_log("fb driver didn't find a framebuffer, exiting");
return 1;
}
j6_handle_t fb_handle = j6_handle_invalid;
uint32_t flags =
j6_vm_flag_write |
j6_vm_flag_write_combine;
j6_status_t s = j6_system_map_mmio(__handle_sys, &fb_handle, fb->addr, fb->size, flags);
if (s != j6_status_ok) {
return s;
}
s = j6_vma_map(fb_handle, __handle_self, fb->addr);
if (s != j6_status_ok) {
return s;
}
const screen::pixel_order order = (fb->flags & 1) ?
screen::pixel_order::bgr8 : screen::pixel_order::rgb8;
screen scr(
reinterpret_cast<void*>(fb->addr),
fb->horizontal,
fb->vertical,
fb->scanline,
order);
font fnt;
screen::pixel_t fg = scr.color(0xb0, 0xb0, 0xb0);
screen::pixel_t bg = scr.color(49, 79, 128);
scr.fill(bg);
scr.update();
constexpr int margin = 2;
const unsigned xstride = (margin + fnt.width());
const unsigned ystride = (margin + fnt.height());
const unsigned rows = (scr.height() - margin) / ystride;
const unsigned cols = (scr.width() - margin) / xstride;
scrollback scroll(rows, cols);
int pending = 0;
constexpr int pending_threshold = 5;
j6_handle_t sys = __handle_sys;
size_t buffer_size = 0;
void *message_buffer = nullptr;
while (true) {
size_t size = buffer_size;
j6_status_t s = j6_system_get_log(sys, message_buffer, &size);
if (s == j6_err_insufficient) {
free(message_buffer);
message_buffer = malloc(size * 2);
buffer_size = size;
continue;
} else if (s != j6_status_ok) {
j6_system_log("fb driver got error from get_log, quitting");
return s;
}
if (size > 0) {
entry *e = reinterpret_cast<entry*>(message_buffer);
size_t eom = e->bytes - sizeof(entry);
e->message[eom] = 0;
scroll.add_line(e->message, eom);
if (++pending > pending_threshold) {
scroll.render(scr, fnt);
scr.update();
pending = 0;
}
} else {
if (pending) {
scroll.render(scr, fnt);
scr.update();
pending = 0;
}
}
}
j6_system_log("fb driver done, exiting");
return 0;
}

View File

@@ -0,0 +1,10 @@
name = "drv.uefi_fb"
targets = ["user"]
deps = ["libc"]
sources = [
"font.cpp",
"main.cpp",
"screen.cpp",
"scrollback.cpp",
]

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@@ -0,0 +1,48 @@
#include <stdlib.h>
#include <string.h>
#include "screen.h"
screen::screen(volatile void *addr, unsigned hres, unsigned vres, unsigned scanline, pixel_order order) :
m_fb(static_cast<volatile pixel_t *>(addr)),
m_order(order),
m_scanline(scanline),
m_resx(hres),
m_resy(vres)
{
const size_t size = scanline * vres;
m_back = reinterpret_cast<pixel_t*>(malloc(size * sizeof(pixel_t)));
}
screen::pixel_t
screen::color(uint8_t r, uint8_t g, uint8_t b) const
{
switch (m_order) {
case pixel_order::bgr8:
return
(static_cast<uint32_t>(b) << 0) |
(static_cast<uint32_t>(g) << 8) |
(static_cast<uint32_t>(r) << 16);
case pixel_order::rgb8:
return
(static_cast<uint32_t>(r) << 0) |
(static_cast<uint32_t>(g) << 8) |
(static_cast<uint32_t>(b) << 16);
}
}
void
screen::fill(pixel_t color)
{
const size_t len = m_scanline * m_resy;
asm volatile ( "rep stosl" : :
"a"(color), "c"(len), "D"(m_back) );
}
void
screen::update()
{
const size_t len = m_scanline * m_resy * sizeof(pixel_t);
asm volatile ( "rep movsb" : :
"c"(len), "S"(m_back), "D"(m_fb) );
}

View File

@@ -0,0 +1,36 @@
#pragma once
#include <stddef.h>
#include <stdint.h>
class screen
{
public:
using pixel_t = uint32_t;
enum class pixel_order : uint8_t { bgr8, rgb8, };
screen(volatile void *addr, unsigned hres, unsigned vres, unsigned scanline, pixel_order order);
unsigned width() const { return m_resx; }
unsigned height() const { return m_resy; }
pixel_t color(uint8_t r, uint8_t g, uint8_t b) const;
void fill(pixel_t color);
inline void draw_pixel(unsigned x, unsigned y, pixel_t color) {
const size_t index = x + y * m_scanline;
m_back[index] = color;
}
void update();
private:
volatile pixel_t *m_fb;
pixel_t *m_back;
pixel_order m_order;
unsigned m_scanline;
unsigned m_resx, m_resy;
screen() = delete;
};

View File

@@ -0,0 +1,58 @@
#include <stdlib.h>
#include <string.h>
#include "font.h"
#include "screen.h"
#include "scrollback.h"
scrollback::scrollback(unsigned lines, unsigned cols, unsigned margin) :
m_rows {lines},
m_cols {cols},
m_count {0},
m_margin {margin}
{
m_data = reinterpret_cast<char*>(malloc(lines*cols));
memset(m_data, ' ', lines*cols);
}
void
scrollback::add_line(const char *line, size_t len)
{
unsigned i = m_count++ % m_rows;
if (len > m_cols)
len = m_cols;
char *start = m_data + (i * m_cols);
memcpy(start, line, len);
if (len < m_cols)
memset(start + len, ' ', m_cols - len);
}
char *
scrollback::get_line(unsigned i)
{
unsigned line = (i + m_count) % m_rows;
return &m_data[line*m_cols];
}
void
scrollback::render(screen &scr, font &fnt)
{
screen::pixel_t fg = scr.color(0xb0, 0xb0, 0xb0);
screen::pixel_t bg = scr.color(49, 79, 128);
const unsigned xstride = (m_margin + fnt.width());
const unsigned ystride = (m_margin + fnt.height());
unsigned start = m_count <= m_rows ? 0 :
m_count % m_rows;
for (unsigned y = 0; y < m_rows; ++y) {
unsigned i = (start + y) % m_rows;
char *line = &m_data[i*m_cols];
for (unsigned x = 0; x < m_cols; ++x) {
fnt.draw_glyph(scr, line[x], fg, bg, m_margin+x*xstride, m_margin+y*ystride);
}
}
}

View File

@@ -0,0 +1,25 @@
#pragma once
/// \file scrollback.h
class screen;
class font;
class scrollback
{
public:
scrollback(unsigned lines, unsigned cols, unsigned margin = 2);
void add_line(const char *line, size_t len);
char * get_line(unsigned i);
void render(screen &scr, font &fnt);
private:
char *m_data;
unsigned m_rows, m_cols;
unsigned m_start;
unsigned m_count;
unsigned m_margin;
};

22
src/user/testapp/io.cpp Normal file
View File

@@ -0,0 +1,22 @@
#include "io.h"
uint8_t
inb(uint16_t port)
{
uint8_t val;
__asm__ __volatile__ ( "inb %1, %0" : "=a"(val) : "Nd"(port) );
return val;
}
void
outb(uint16_t port, uint8_t val)
{
__asm__ __volatile__ ( "outb %0, %1" :: "a"(val), "Nd"(port) );
}
void
io_wait(unsigned times)
{
for (unsigned i = 0; i < times; ++i)
outb(0x80, 0);
}

24
src/user/testapp/io.h Normal file
View File

@@ -0,0 +1,24 @@
#pragma once
#include <stdint.h>
extern "C" {
/// Read a byte from an IO port.
/// \arg port The address of the IO port
/// \returns One byte read from the port
uint8_t inb(uint16_t port);
/// Write a byte to an IO port.
/// \arg port The addres of the IO port
/// \arg val The byte to write
void outb(uint16_t port, uint8_t val);
/// Pause briefly by doing IO to port 0x80
/// \arg times Number of times to delay by writing
void io_wait(unsigned times = 1);
}
constexpr uint16_t COM1 = 0x03f8;
constexpr uint16_t COM2 = 0x02f8;

152
src/user/testapp/main.cpp Normal file
View File

@@ -0,0 +1,152 @@
#include <stdint.h>
#include <stdlib.h>
#include "j6/types.h"
#include "j6/errors.h"
#include "j6/signals.h"
#include "j6/syscalls.h"
#include "io.h"
#include "serial.h"
char inbuf[1024];
extern j6_handle_t __handle_sys;
j6_handle_t endp = j6_handle_invalid;
extern "C" {
int main(int, const char **);
}
void
thread_proc()
{
j6_system_log("sub thread starting");
char buffer[512];
size_t len = sizeof(buffer);
j6_tag_t tag = 0;
j6_status_t result = j6_endpoint_receive(endp, &tag, &len, (void*)buffer);
if (result != j6_status_ok)
j6_thread_exit(result);
j6_system_log("sub thread received message");
for (int i = 0; i < len; ++i)
if (buffer[i] >= 'A' && buffer[i] <= 'Z')
buffer[i] += 0x20;
tag++;
result = j6_endpoint_send(endp, tag, len, (void*)buffer);
if (result != j6_status_ok)
j6_thread_exit(result);
j6_system_log("sub thread sent message");
for (int i = 1; i < 5; ++i)
j6_thread_sleep(i*10);
j6_system_log("sub thread exiting");
j6_thread_exit(0);
}
int
main(int argc, const char **argv)
{
j6_handle_t children[2] = {j6_handle_invalid, j6_handle_invalid};
j6_signal_t out = 0;
j6_system_log("main thread starting");
for (int i = 0; i < argc; ++i)
j6_system_log(argv[i]);
void *base = malloc(0x1000);
if (!base)
return 1;
uint64_t *vma_ptr = reinterpret_cast<uint64_t*>(base);
for (int i = 0; i < 3; ++i)
vma_ptr[i*100] = uint64_t(i);
j6_system_log("main thread wrote to memory area");
j6_status_t result = j6_endpoint_create(&endp);
if (result != j6_status_ok)
return result;
j6_system_log("main thread created endpoint");
result = j6_thread_create(reinterpret_cast<void*>(&thread_proc), &children[1]);
if (result != j6_status_ok)
return result;
j6_system_log("main thread created sub thread");
char message[] = "MAIN THREAD SUCCESSFULLY CALLED SENDRECV IF THIS IS LOWERCASE";
size_t size = sizeof(message);
j6_tag_t tag = 16;
result = j6_endpoint_sendrecv(endp, &tag, &size, (void*)message);
if (result != j6_status_ok)
return result;
if (tag != 17)
j6_system_log("GOT WRONG TAG FROM SENDRECV");
result = j6_system_bind_irq(__handle_sys, endp, 3);
if (result != j6_status_ok)
return result;
j6_system_log(message);
j6_system_log("main thread creating a new process");
result = j6_process_create(&children[0]);
if (result != j6_status_ok)
return result;
j6_system_log("main thread waiting on children");
j6_handle_t outhandle;
result = j6_object_wait_many(children, 2, -1ull, &outhandle, &out);
if (result != j6_status_ok)
return result;
if (outhandle == children[1]) {
j6_system_log(" ok from child thread");
} else if (outhandle == children[0]) {
j6_system_log(" ok from child process");
} else {
j6_system_log(" ... got unknown handle");
}
j6_system_log("main testing irqs");
serial_port com2(COM2);
const char *fgseq = "\x1b[2J";
while (*fgseq)
com2.write(*fgseq++);
for (int i = 0; i < 10; ++i)
com2.write('%');
size_t len = 0;
while (true) {
result = j6_endpoint_receive(endp, &tag, &len, nullptr);
if (result != j6_status_ok)
return result;
if (j6_tag_is_irq(tag))
j6_system_log("main thread got irq!");
}
j6_system_log("main thread closing endpoint");
result = j6_object_close(endp);
if (result != j6_status_ok)
return result;
j6_system_log("main thread done, exiting");
return 0;
}

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@@ -0,0 +1,8 @@
name = "testapp"
targets = ["user"]
deps = ["libc"]
sources = [
"io.cpp",
"main.cpp",
"serial.cpp",
]

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@@ -0,0 +1,41 @@
#include "io.h"
#include "serial.h"
serial_port::serial_port() :
m_port(0)
{
}
serial_port::serial_port(uint16_t port) :
m_port(port)
{
outb(port + 1, 0x00); // Disable all interrupts
outb(port + 3, 0x80); // Enable the Divisor Latch Access Bit
outb(port + 0, 0x01); // Divisor low bit: 1 (115200 baud)
outb(port + 1, 0x00); // Divisor high bit
outb(port + 3, 0x03); // 8-N-1
outb(port + 2, 0xe7); // Clear and enable FIFO, enable 64 byte, 56 byte trigger
outb(port + 4, 0x0b); // Data terminal ready, Request to send, aux output 2 (irq enable)
outb(port + 1, 0x03); // Enable interrupts
}
bool serial_port::read_ready() { return (inb(m_port + 5) & 0x01) != 0; }
bool serial_port::write_ready() {
uint8_t lsr = inb(m_port + 5);
return (lsr & 0x20) != 0;
}
char
serial_port::read() {
while (!read_ready());
return inb(m_port);
}
void
serial_port::write(char c) {
while (!write_ready());
outb(m_port, c);
}

26
src/user/testapp/serial.h Normal file
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@@ -0,0 +1,26 @@
#pragma once
/// \file serial.h
/// Declarations related to serial ports.
#include <stdint.h>
#define serial_port nulldrv_serial_port
class serial_port
{
public:
/// Constructor.
/// \arg port The IO address of the serial port
serial_port(uint16_t port);
serial_port();
void write(char c);
char read();
private:
uint16_t m_port;
bool read_ready();
bool write_ready();
};