Remove K210 support.

os/Cargo.toml

@@ -13,9 +13,5 @@ buddy_system_allocator = "0.6"
 bitflags = "1.2.1"
 xmas-elf = "0.7.0"
 
-[features]
-board_qemu = []
-board_k210 = []
-
 [profile.release]
 debug = true

os/src/boards/k210.rs

@@ -1,21 +0,0 @@
-pub const CLOCK_FREQ: usize = 403000000 / 62;
-pub const MEMORY_END: usize = 0x80600000;
-
-pub const MMIO: &[(usize, usize)] = &[
-    // we don't need clint in S priv when running
-    // we only need claim/complete for target0 after initializing
-    (0x0C00_0000, 0x3000), /* PLIC      */
-    (0x0C20_0000, 0x1000), /* PLIC      */
-    (0x3800_0000, 0x1000), /* UARTHS    */
-    (0x3800_1000, 0x1000), /* GPIOHS    */
-    (0x5020_0000, 0x1000), /* GPIO      */
-    (0x5024_0000, 0x1000), /* SPI_SLAVE */
-    (0x502B_0000, 0x1000), /* FPIOA     */
-    (0x502D_0000, 0x1000), /* TIMER0    */
-    (0x502E_0000, 0x1000), /* TIMER1    */
-    (0x502F_0000, 0x1000), /* TIMER2    */
-    (0x5044_0000, 0x1000), /* SYSCTL    */
-    (0x5200_0000, 0x1000), /* SPI0      */
-    (0x5300_0000, 0x1000), /* SPI1      */
-    (0x5400_0000, 0x1000), /* SPI2      */
-];

os/src/linker-k210.ld

@@ -1,53 +0,0 @@
-OUTPUT_ARCH(riscv)
-ENTRY(_start)
-BASE_ADDRESS = 0x80020000;
-
-SECTIONS
-{
-    . = BASE_ADDRESS;
-    skernel = .;
-
-    stext = .;
-    .text : {
-        *(.text.entry)
-        . = ALIGN(4K);
-        strampoline = .;
-        *(.text.trampoline);
-        . = ALIGN(4K);
-        *(.text .text.*)
-    }
-
-    . = ALIGN(4K);
-    etext = .;
-    srodata = .;
-    .rodata : {
-        *(.rodata .rodata.*)
-        *(.srodata .srodata.*)
-    }
-
-    . = ALIGN(4K);
-    erodata = .;
-    sdata = .;
-    .data : {
-        *(.data .data.*)
-        *(.sdata .sdata.*)
-    }
-
-    . = ALIGN(4K);
-    edata = .;
-    sbss_with_stack = .;
-    .bss : {
-        *(.bss.stack)
-        sbss = .;
-        *(.bss .bss.*)
-        *(.sbss .sbss.*)
-    }
-
-    . = ALIGN(4K);
-    ebss = .;
-    ekernel = .;
-
-    /DISCARD/ : {
-        *(.eh_frame)
-    }
-}