esp8266: Change bignum from mpz to longlong; move some rodata to iram.

Some rodata items can go in iram/irom segment, but not others.  With
this patch ESP now has 24256 bytes of heap ram.  It passes 228 out of
248 tests from tests/basics directory.

5 files changed, 81 insertions, 39 deletions

diff --git a/esp8266/Makefile b/esp8266/Makefile
index 1e5555a3ab..10f6d7e2d2 100644
--- a/esp8266/Makefile
+++ b/esp8266/Makefile
@@ -27,7 +27,7 @@ LDFLAGS = -nostdlib -T esp8266.ld -Map=$(@:.elf=.map) --cref
 LIBS = -L$(ESP_SDK)/lib -lmain -ljson -llwip -lpp -lnet80211 -lwpa -lphy -lnet80211
 
 LIBGCC_FILE_NAME = $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
-LIBS += -L $(dir $(LIBGCC_FILE_NAME)) -lgcc
+LIBS += -L$(dir $(LIBGCC_FILE_NAME)) -lgcc
 
 # Debugging/Optimization
 ifeq ($(DEBUG), 1)
@@ -40,6 +40,7 @@ LDFLAGS += --gc-sections
 endif
 
 SRC_C = \
+	strtoll.c \
 	main.c \
 	esp_mphal.c \
 	gccollect.c \
diff --git a/esp8266/esp8266.ld b/esp8266/esp8266.ld
index 34171c357f..b845fad219 100644
--- a/esp8266/esp8266.ld
+++ b/esp8266/esp8266.ld
@@ -52,7 +52,7 @@ SECTIONS
         *(.dport.rodata)
         _dport0_rodata_end = ABSOLUTE(.);
     } >dport0_0_seg :dport0_0_phdr
-  
+
     .dport0.literal : ALIGN(4)
     {
         _dport0_literal_start = ABSOLUTE(.);
@@ -60,7 +60,7 @@ SECTIONS
         *(.dport.literal)
         _dport0_literal_end = ABSOLUTE(.);
     } >dport0_0_seg :dport0_0_phdr
-  
+
     .dport0.data : ALIGN(4)
     {
         _dport0_data_start = ABSOLUTE(.);
@@ -68,7 +68,48 @@ SECTIONS
         *(.dport.data)
         _dport0_data_end = ABSOLUTE(.);
     } >dport0_0_seg :dport0_0_phdr
-  
+
+    .irom0.text : ALIGN(4)
+    {
+        _irom0_text_start = ABSOLUTE(.);
+        *(.irom0.literal .irom.literal .irom.text.literal .irom0.text .irom.text)
+        *py*.o*(.literal* .text*)
+        *gccollect.o*(.literal* .text*)
+        *gchelper.o*(.literal* .text*)
+        _irom0_text_end = ABSOLUTE(.);
+    } >irom0_0_seg :irom0_0_phdr
+
+    .text : ALIGN(4)
+    {
+        _stext = .;
+        _text_start = ABSOLUTE(.);
+        *(.entry.text)
+        *(.init.literal)
+        *(.init)
+        *(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
+        *(.fini.literal)
+        *(.fini)
+        *(.gnu.version)
+        *qstr.o(.rodata.const_pool)
+        *.o(.rodata.mp_type_*)
+        /*
+        can't put these here for some reason...
+        *builtin.o(.rodata.mp_builtin_*_obj)
+        *parse.o(.rodata.rule_*)
+        */
+        _text_end = ABSOLUTE(.);
+        _etext = .;
+    } >iram1_0_seg :iram1_0_phdr
+
+    .lit4 : ALIGN(4)
+    {
+        _lit4_start = ABSOLUTE(.);
+        *(*.lit4)
+        *(.lit4.*)
+        *(.gnu.linkonce.lit4.*)
+        _lit4_end = ABSOLUTE(.);
+    } >iram1_0_seg :iram1_0_phdr
+
     .data : ALIGN(4)
     {
         _data_start = ABSOLUTE(.);
@@ -85,7 +126,7 @@ SECTIONS
         *(.jcr)
         _data_end = ABSOLUTE(.);
     } >dram0_0_seg :dram0_0_phdr
-  
+
     .rodata : ALIGN(4)
     {
         _rodata_start = ABSOLUTE(.);
@@ -123,7 +164,7 @@ SECTIONS
         _bss_table_end = ABSOLUTE(.);
         _rodata_end = ABSOLUTE(.);
     } >dram0_0_seg :dram0_0_phdr
-  
+
     .bss ALIGN(8) (NOLOAD) : ALIGN(4)
     {
         . = ALIGN (8);
@@ -145,38 +186,6 @@ SECTIONS
         _bss_end = ABSOLUTE(.);
         _heap_start = ABSOLUTE(.);
     } >dram0_0_seg :dram0_0_bss_phdr
-  
-    .irom0.text : ALIGN(4)
-    {
-        _irom0_text_start = ABSOLUTE(.);
-        *(.irom0.literal .irom.literal .irom.text.literal .irom0.text .irom.text)
-        *py*.o*(.literal* .text*)
-        _irom0_text_end = ABSOLUTE(.);
-    } >irom0_0_seg :irom0_0_phdr
-  
-    .text : ALIGN(4)
-    {
-        _stext = .;
-        _text_start = ABSOLUTE(.);
-        *(.entry.text)
-        *(.init.literal)
-        *(.init)
-        *(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
-        *(.fini.literal)
-        *(.fini)
-        *(.gnu.version)
-        _text_end = ABSOLUTE(.);
-        _etext = .;
-    } >iram1_0_seg :iram1_0_phdr
-  
-    .lit4 : ALIGN(4)
-    {
-        _lit4_start = ABSOLUTE(.);
-        *(*.lit4)
-        *(.lit4.*)
-        *(.gnu.linkonce.lit4.*)
-        _lit4_end = ABSOLUTE(.);
-    } >iram1_0_seg :iram1_0_phdr
 }
 
 /* get ROM code address */
diff --git a/esp8266/main.c b/esp8266/main.c
index bab79d6fc5..2f05ed0226 100644
--- a/esp8266/main.c
+++ b/esp8266/main.c
@@ -44,6 +44,7 @@
 #include MICROPY_HAL_H
 
 void user_init(void) {
+soft_reset:
     //mp_stack_set_limit((char*)&_ram_end - (char*)&_heap_end - 1024);
     mp_hal_init();
     gc_init(&_heap_start, &_heap_end);
@@ -65,6 +66,8 @@ void user_init(void) {
             }
         }
     }
+
+    goto soft_reset;
 }
 
 mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
diff --git a/esp8266/mpconfigport.h b/esp8266/mpconfigport.h
index 8a225a0c18..fbf77f645c 100644
--- a/esp8266/mpconfigport.h
+++ b/esp8266/mpconfigport.h
@@ -31,7 +31,7 @@
 #define MICROPY_PY_SYS_EXIT         (1)
 #define MICROPY_PY_SYS_STDFILES     (1)
 #define MICROPY_CPYTHON_COMPAT      (0)
-#define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_MPZ)
+#define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_LONGLONG)
 #define MICROPY_FLOAT_IMPL          (MICROPY_FLOAT_IMPL_NONE)
 #define MICROPY_ERROR_REPORTING     (MICROPY_ERROR_REPORTING_TERSE)
 
diff --git a/esp8266/strtoll.c b/esp8266/strtoll.c
new file mode 100644
index 0000000000..4e8a4d0566
--- /dev/null
+++ b/esp8266/strtoll.c
@@ -0,0 +1,29 @@
+#include <stdlib.h>
+
+// assumes endptr != NULL
+// doesn't check for sign
+// doesn't check for base-prefix
+long long int strtoll(const char *nptr, char **endptr, int base) {
+    long long val = 0;
+
+    for (; *nptr; nptr++) {
+        int v = *nptr;
+        if ('0' <= v && v <= '9') {
+            v -= '0';
+        } else if ('A' <= v && v <= 'Z') {
+            v -= 'A' - 10;
+        } else if ('a' <= v && v <= 'z') {
+            v -= 'a' - 10;
+        } else {
+            break;
+        }
+        if (v >= base) {
+            break;
+        }
+        val = val * base + v;
+    }
+
+    *endptr = (char*)nptr;
+
+    return val;
+}