Add ld script for keymap section

3 files changed, 284 insertions, 8 deletions

diff --git a/keyboard/hhkb/Makefile b/keyboard/hhkb/Makefile
index 1ef0a0187a..3422193721 100644
--- a/keyboard/hhkb/Makefile
+++ b/keyboard/hhkb/Makefile
@@ -119,6 +119,10 @@ COMMAND_ENABLE = yes    # Commands for debug and configuration
 NKRO_ENABLE = yes	# USB Nkey Rollover
 
 
+# keymap section
+EXTRALDFLAGS = -Wl,-Tld_keymap_avr5.x
+OPT_DEFS += -DKEYMAP_SECTION
+
 # Search Path
 VPATH += $(TARGET_DIR)
 VPATH += $(TOP_DIR)
@@ -128,4 +132,5 @@ include $(TOP_DIR)/common.mk
 include $(TOP_DIR)/rules.mk
 
 debug-on: EXTRAFLAGS += -DDEBUG
+#debug-on: EXTRAFLAGS += -DDEBUG -DDEBUG_ACTION
 debug-on: all
diff --git a/keyboard/hhkb/keymap.c b/keyboard/hhkb/keymap.c
index faa62dd7e1..5c3bc9de6f 100644
--- a/keyboard/hhkb/keymap.c
+++ b/keyboard/hhkb/keymap.c
@@ -48,8 +48,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
     { KC_##K70, KC_##K71, KC_##K72, KC_##K73, KC_##K74, KC_##K75, KC_##K76, KC_NO    } \
 }
 
-
-static const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+#ifdef KEYMAP_SECTION
+const uint8_t keymaps[][MATRIX_ROWS][MATRIX_COLS] __attribute__ ((section (".keymap.keymaps"))) = {
+#else
+static const uint8_t keymaps[][MATRIX_ROWS][MATRIX_COLS] PROGMEM = {
+#endif
     /* Layer 0: Default Layer
      * ,-----------------------------------------------------------.
      * |Esc|  1|  2|  3|  4|  5|  6|  7|  8|  9|  0|  -|  =|  \|  `|
@@ -186,7 +189,11 @@ enum macro_id {
 /*
  * Fn action definition
  */
-static const uint16_t PROGMEM fn_actions[] = {
+#ifdef KEYMAP_SECTION
+const uint16_t fn_actions[] __attribute__ ((section (".keymap.fn_actions"))) = {
+#else
+static const uint16_t fn_actions[] PROGMEM = {
+#endif
     [0] = ACTION_DEFAULT_LAYER_SET(0),                // Default layer(not used)
     [1] = ACTION_LAYER_TAP_TOGGLE(1),                 // HHKB layer(toggle with 5 taps)
     [2] = ACTION_LAYER_TAP_KEY(2, KC_SLASH),          // Cursor layer with Slash*
@@ -310,10 +317,6 @@ uint8_t keymap_key_to_keycode(uint8_t layer, key_t key)
 action_t keymap_fn_to_action(uint8_t keycode)
 {
     action_t action;
-    if (FN_INDEX(keycode) < sizeof(fn_actions) / sizeof(fn_actions[0])) {
-        action.code = pgm_read_word(&fn_actions[FN_INDEX(keycode)]);
-    } else {
-        action.code = ACTION_NO;
-    }
+    action.code = pgm_read_word(&fn_actions[FN_INDEX(keycode)]);
     return action;
 }
diff --git a/keyboard/hhkb/ld_keymap_avr5.x b/keyboard/hhkb/ld_keymap_avr5.x
new file mode 100644
index 0000000000..c09693e514
--- /dev/null
+++ b/keyboard/hhkb/ld_keymap_avr5.x
@@ -0,0 +1,268 @@
+/* 
+ * linker script for configurable keymap
+ *
+ * This adds keymap section which places keymap at fixed address and
+ * is based on binutils-avr ldscripts(/usr/lib/ldscripts/avr5.x).
+ */
+OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")
+OUTPUT_ARCH(avr:5)
+MEMORY
+{
+  /* With keymap section 
+   *
+   * Flash Map of ATMega32U4(32KB)
+   * +------------+ 0x0000
+   * | .vectors   |
+   * | .progmem   |
+   * | .init0-9   | > text region
+   * | .text      |
+   * | .fini9-0   |
+   * |            |
+   * |------------| _etext
+   * | .data      |
+   * | .bss       | > data region
+   * | .noinit    |
+   * |            |
+   * |------------| 0x6800
+   * | .keymap    | > keymap region(2KB)
+   * |------------| 0x7000
+   * | bootloader | 4KB
+   * +------------+ 0x7FFF
+   */
+  text   (rx)   : ORIGIN = 0, LENGTH = 128K
+  keymap (rw!x) : ORIGIN = 0x6800, LENGTH = 2K
+  data   (rw!x) : ORIGIN = 0x800060, LENGTH = 0xffa0
+  eeprom (rw!x) : ORIGIN = 0x810000, LENGTH = 64K
+  fuse      (rw!x) : ORIGIN = 0x820000, LENGTH = 1K
+  lock      (rw!x) : ORIGIN = 0x830000, LENGTH = 1K
+  signature (rw!x) : ORIGIN = 0x840000, LENGTH = 1K
+}
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  .hash          : { *(.hash)		}
+  .dynsym        : { *(.dynsym)		}
+  .dynstr        : { *(.dynstr)		}
+  .gnu.version   : { *(.gnu.version)	}
+  .gnu.version_d   : { *(.gnu.version_d)	}
+  .gnu.version_r   : { *(.gnu.version_r)	}
+  .rel.init      : { *(.rel.init)		}
+  .rela.init     : { *(.rela.init)	}
+  .rel.text      :
+    {
+      *(.rel.text)
+      *(.rel.text.*)
+      *(.rel.gnu.linkonce.t*)
+    }
+  .rela.text     :
+    {
+      *(.rela.text)
+      *(.rela.text.*)
+      *(.rela.gnu.linkonce.t*)
+    }
+  .rel.fini      : { *(.rel.fini)		}
+  .rela.fini     : { *(.rela.fini)	}
+  .rel.rodata    :
+    {
+      *(.rel.rodata)
+      *(.rel.rodata.*)
+      *(.rel.gnu.linkonce.r*)
+    }
+  .rela.rodata   :
+    {
+      *(.rela.rodata)
+      *(.rela.rodata.*)
+      *(.rela.gnu.linkonce.r*)
+    }
+  .rel.data      :
+    {
+      *(.rel.data)
+      *(.rel.data.*)
+      *(.rel.gnu.linkonce.d*)
+    }
+  .rela.data     :
+    {
+      *(.rela.data)
+      *(.rela.data.*)
+      *(.rela.gnu.linkonce.d*)
+    }
+  .rel.ctors     : { *(.rel.ctors)	}
+  .rela.ctors    : { *(.rela.ctors)	}
+  .rel.dtors     : { *(.rel.dtors)	}
+  .rela.dtors    : { *(.rela.dtors)	}
+  .rel.got       : { *(.rel.got)		}
+  .rela.got      : { *(.rela.got)		}
+  .rel.bss       : { *(.rel.bss)		}
+  .rela.bss      : { *(.rela.bss)		}
+  .rel.plt       : { *(.rel.plt)		}
+  .rela.plt      : { *(.rela.plt)		}
+  /* Internal text space or external memory.  */
+  .text   :
+  {
+    *(.vectors)
+    KEEP(*(.vectors))
+    /* For data that needs to reside in the lower 64k of progmem.  */
+    *(.progmem.gcc*)
+    *(.progmem*)
+    . = ALIGN(2);
+     __trampolines_start = . ;
+    /* The jump trampolines for the 16-bit limited relocs will reside here.  */
+    *(.trampolines)
+    *(.trampolines*)
+     __trampolines_end = . ;
+    /* For future tablejump instruction arrays for 3 byte pc devices.
+       We don't relax jump/call instructions within these sections.  */
+    *(.jumptables)
+    *(.jumptables*)
+    /* For code that needs to reside in the lower 128k progmem.  */
+    *(.lowtext)
+    *(.lowtext*)
+     __ctors_start = . ;
+     *(.ctors)
+     __ctors_end = . ;
+     __dtors_start = . ;
+     *(.dtors)
+     __dtors_end = . ;
+    KEEP(SORT(*)(.ctors))
+    KEEP(SORT(*)(.dtors))
+    /* From this point on, we don't bother about wether the insns are
+       below or above the 16 bits boundary.  */
+    *(.init0)  /* Start here after reset.  */
+    KEEP (*(.init0))
+    *(.init1)
+    KEEP (*(.init1))
+    *(.init2)  /* Clear __zero_reg__, set up stack pointer.  */
+    KEEP (*(.init2))
+    *(.init3)
+    KEEP (*(.init3))
+    *(.init4)  /* Initialize data and BSS.  */
+    KEEP (*(.init4))
+    *(.init5)
+    KEEP (*(.init5))
+    *(.init6)  /* C++ constructors.  */
+    KEEP (*(.init6))
+    *(.init7)
+    KEEP (*(.init7))
+    *(.init8)
+    KEEP (*(.init8))
+    *(.init9)  /* Call main().  */
+    KEEP (*(.init9))
+    *(.text)
+    . = ALIGN(2);
+    *(.text.*)
+    . = ALIGN(2);
+    *(.fini9)  /* _exit() starts here.  */
+    KEEP (*(.fini9))
+    *(.fini8)
+    KEEP (*(.fini8))
+    *(.fini7)
+    KEEP (*(.fini7))
+    *(.fini6)  /* C++ destructors.  */
+    KEEP (*(.fini6))
+    *(.fini5)
+    KEEP (*(.fini5))
+    *(.fini4)
+    KEEP (*(.fini4))
+    *(.fini3)
+    KEEP (*(.fini3))
+    *(.fini2)
+    KEEP (*(.fini2))
+    *(.fini1)
+    KEEP (*(.fini1))
+    *(.fini0)  /* Infinite loop after program termination.  */
+    KEEP (*(.fini0))
+     _etext = . ;
+  }  > text
+  .data	  : AT (ADDR (.text) + SIZEOF (.text))
+  {
+     PROVIDE (__data_start = .) ;
+    *(.data)
+    *(.data*)
+    *(.rodata)  /* We need to include .rodata here if gcc is used */
+    *(.rodata*) /* with -fdata-sections.  */
+    *(.gnu.linkonce.d*)
+    . = ALIGN(2);
+     _edata = . ;
+     PROVIDE (__data_end = .) ;
+  }  > data
+  .bss   : AT (ADDR (.bss))
+  {
+     PROVIDE (__bss_start = .) ;
+    *(.bss)
+    *(.bss*)
+    *(COMMON)
+     PROVIDE (__bss_end = .) ;
+  }  > data
+   __data_load_start = LOADADDR(.data);
+   __data_load_end = __data_load_start + SIZEOF(.data);
+  /* Global data not cleared after reset.  */
+  .noinit  :
+  {
+     PROVIDE (__noinit_start = .) ;
+    *(.noinit*)
+     PROVIDE (__noinit_end = .) ;
+     _end = . ;
+     PROVIDE (__heap_start = .) ;
+  }  > data
+  /* keymap region is located at end of flash
+   * .fn_actions        Fn actions definitions
+   * .keymaps           Mapping layers
+   */
+  .keymap :
+  {
+    PROVIDE(__keymap_start = .) ;
+    *(.keymap.fn_actions)   /* 32*actions = 64bytes */
+    . = ALIGN(0x40); 
+    *(.keymap.keymaps)      /* rest of .keymap section */
+    *(.keymap*)
+    /* . = ALIGN(0x800); */ /* keymap section takes 2KB- */
+  } > keymap = 0x00         /* zero fill */
+  .eeprom  :
+  {
+    *(.eeprom*)
+     __eeprom_end = . ;
+  }  > eeprom
+  .fuse  :
+  {
+    KEEP(*(.fuse))
+    KEEP(*(.lfuse))
+    KEEP(*(.hfuse))
+    KEEP(*(.efuse))
+  }  > fuse
+  .lock  :
+  {
+    KEEP(*(.lock*))
+  }  > lock
+  .signature  :
+  {
+    KEEP(*(.signature*))
+  }  > signature
+  /* Stabs debugging sections.  */
+  .stab 0 : { *(.stab) }
+  .stabstr 0 : { *(.stabstr) }
+  .stab.excl 0 : { *(.stab.excl) }
+  .stab.exclstr 0 : { *(.stab.exclstr) }
+  .stab.index 0 : { *(.stab.index) }
+  .stab.indexstr 0 : { *(.stab.indexstr) }
+  .comment 0 : { *(.comment) }
+  /* DWARF debug sections.
+     Symbols in the DWARF debugging sections are relative to the beginning
+     of the section so we begin them at 0.  */
+  /* DWARF 1 */
+  .debug          0 : { *(.debug) }
+  .line           0 : { *(.line) }
+  /* GNU DWARF 1 extensions */
+  .debug_srcinfo  0 : { *(.debug_srcinfo) }
+  .debug_sfnames  0 : { *(.debug_sfnames) }
+  /* DWARF 1.1 and DWARF 2 */
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+  .debug_frame    0 : { *(.debug_frame) }
+  .debug_str      0 : { *(.debug_str) }
+  .debug_loc      0 : { *(.debug_loc) }
+  .debug_macinfo  0 : { *(.debug_macinfo) }
+}