From 758af92799656991c5e5b8d8a72381fb5cd6170f Mon Sep 17 00:00:00 2001
From: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Date: Tue, 20 Aug 2019 18:59:56 +0200
Subject: Add embedded examples menu and resources.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
---
 qtmips_gui/samples/template-os.S | 114 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 qtmips_gui/samples/template-os.S

(limited to 'qtmips_gui/samples/template-os.S')

diff --git a/qtmips_gui/samples/template-os.S b/qtmips_gui/samples/template-os.S
new file mode 100644
index 0000000..6c2264f
--- /dev/null
+++ b/qtmips_gui/samples/template-os.S
@@ -0,0 +1,114 @@
+//  Template file with defines of peripheral registers
+//  QtMips simulator https://github.com/cvut/QtMips/
+//  developed by Karel Koci and Pavel Pisa.
+//
+//  template.S       - example file
+//
+//  (C) 2019 by Pavel Pisa
+//      e-mail:   pisa@cmp.felk.cvut.cz
+//      homepage: http://cmp.felk.cvut.cz/~pisa
+//      work:     http://www.pikron.com/
+//      license:  public domain
+
+.globl _start
+.globl __start
+.set noreorder
+.ent _start
+
+// Serial port/terminal registers
+// There is mirror of this region at address 0xffff0000
+// to match QtSpim and Mars emulators
+
+.equ SERIAL_PORT_BASE,      0xffffc000 // base address of serial port region
+
+.equ SERP_RX_ST_REG,        0xffffc000 // Receiver status register
+.equ SERP_RX_ST_REG_o,          0x0000 // Offset of RX_ST_REG
+.equ SERP_RX_ST_REG_READY_m,       0x1 // Data byte is ready to be read
+.equ SERP_RX_ST_REG_IE_m,          0x2 // Enable Rx ready interrupt
+
+.equ SERP_RX_DATA_REG,      0xffffc004 // Received data byte in 8 LSB bits
+.equ SERP_RX_DATA_REG_o,        0x0004 // Offset of RX_DATA_REG
+
+.equ SERP_TX_ST_REG,        0xffffc008 // Transmitter status register
+.equ SERP_TX_ST_REG_o,          0x0008 // Offset of TX_ST_REG
+.equ SERP_TX_ST_REG_READY_m,       0x1 // Transmitter can accept next byte
+.equ SERP_TX_ST_REG_IE_m,          0x2 // Enable Tx ready interrupt
+
+.equ SERP_TX_DATA_REG,      0xffffc00c // Write word to send 8 LSB bits to terminal
+.equ SERP_TX_DATA_REG_o,        0x000c // Offset of TX_DATA_REG
+
+
+// Memory mapped peripheral for dial knobs input,
+// LED and RGB LEDs output designed to match
+// MZ_APO education Zynq based board developed
+// by Petr Porazil and Pavel Pisa at PiKRON.com company
+
+.equ SPILED_REG_BASE        0xffffc100 // base of SPILED port region
+
+.equ SPILED_REG_LED_LINE,   0xffffc104 // 32 bit word mapped as output
+.equ SPILED_REG_LED_LINE_o,     0x0004 // Offset of the LED_LINE
+.equ SPILED_REG_LED_RGB1,   0xffffc110 // RGB LED 1 color components
+.equ SPILED_REG_LED_RGB1_o,     0x0010 // Offset of LED_RGB1
+.equ SPILED_REG_LED_RGB2,   0xffffc114 // RGB LED 2 color components
+.equ SPILED_REG_LED_RGB2_o,     0x0014 // Offset of LED_RGB2
+.equ SPILED_REG_KNOBS_8BIT, 0xffffc124 // Three 8 bit knob values
+.equ SPILED_REG_KNOBS_8BIT_o,   0x0024 // Offset of KNOBS_8BIT
+
+// The simple 16-bit per pixel (RGB565) frame-buffer
+// display size is 480 x 320 pixel
+// Pixel format RGB565 expect
+//   bits 11 .. 15 red component
+//   bits  5 .. 10 green component
+//   bits  0 ..  4 blue component
+.equ LCD_FB_START,          0xffe00000
+.equ LCD_FB_END,            0xffe4afff
+
+// Mapping of interrupts
+// Irq number   Cause/Status Bit   Source
+//  2 / HW0      10                Serial port ready to accept character to Tx
+//  3 / HW1      11                There is received character ready to be read
+//  7 / HW5      15                Counter reached value in Compare register
+
+
+// Linux kernel compatible system calls subset
+
+.equ __NR_exit,     4001	// void exit(int status)
+.equ __NR_read,     4003	// ssize_t read(int fd, void *buf, size_t count)
+.equ __NR_write,    4004	// ssize_t write(int fd, const void *buf, size_t count)
+.equ __NR_close,    4006	// int close(int fd)
+.equ __NR_open,     4005	// int open(const char *pathname, int flags, mode_t mode)
+.equ __NR_brk,      4045	// void * brk(void *addr)
+.equ __NR_truncate, 4092	// int ftruncate(int fd, off_t length)
+.equ __NR_readv,    4145	// ssize_t readv(int fd, const struct iovec *iov, int iovcnt)
+.equ __NR_writev,   4146	// ssize_t writev(int fd, const struct iovec *iov, int iovcnt)
+.equ __NR_set_thread_area, 4283 // int set_thread_area(unsigned long addr)
+
+// Original MIPS start address after reset
+.org    0x80020000
+
+.text
+
+__start:
+_start:
+
+	addi	$v0, $zero, __NR_write
+	addi	$a0, $zero, 1
+	la	$a1, text_1
+	addi	$a2, $zero, text_1_e - text_1
+	syscall
+
+	addi	$v0, $zero, __NR_exit
+	addi	$a0, $zero, 0
+
+final:	break
+	beq	$zero, $zero, final
+	nop
+
+.end _start
+
+.data
+
+data_1:	.word	1, 2, 3, 4
+
+text_1:	.ascii	"Hello word.\n"	// store ASCII text, no termination
+text_1_e:
-- 
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