Re: [ECOS] Kinetis CYG_HAL_STARTUP_VAR conflict

[Ilija Kocho <ilijak at siva dot com dot mk>]

Hi Mike

On 01.12.2012 22:07, Michael Jones wrote:
> BACKGROUND
> ----------------------
>
> I am having a little bit of trouble trying to get my first hello world app on a K60 Tower Board.
>
> I have RedBoot running from ROM and I can ping the ethernet port, so presumably I will eventually get GDB to talk to it.
>
> I am having trouble building an initial app that uses the ROM monitor. Following the example in the eCos book, I went hunting for CYGSEM_HAL_USE_ROM_MONITOR, enabled it and then set startup to SRAM. This seems the obvious way to run and debug.
>
> PROBLEM
> --------------
>
> I am getting a conflict I don't know how to resolve. I have set CYG_HAL_STARTUP_VAR = SRAM. This results in CYG_HAL_STARTUP = SRAM by calculation.
>
> But I get a conflict from CYGSEM_HAL_USE_ROM_MONITOR that wants CYG_HAL_STARTUP == RAM
SRAM and RAM startups are not the same. RAM startup is intended for
using under control of RedBoot and has some special properties: RAM,
unlike other startup types uses RedBoot's vectors, etc...

SRAM startup is kind of "stand-alone" in a way it does not depend on
RedBoot (but depends on JTAG debugger)

> QUESTIONS
> -----------------
>
> 1) Can I ignore this conflict and get the monitor and app to work?
I'm afraid not because, SRAM startup collides with RedBoot.
>
> 2) Is there a better approach?
The right approach is to create RAM startup. It could live on variant
level and be available to all Kinetis platforms (though some may have
too little memory to utilize it).
The attached patches should produce proper variant-level RAM startup.

I did not add it from beginning since I consider internal SRAM too
little for practical work, seems that other people have different view.
You are not the first to look for.
This being said, I am considering to add this startup to the main
repository. Would you open a Bug on Bugzilla?

>
> 3) Has anyone succeeded to use RedBoot on the K60 and can you supply an example config project that works that I can look at?
You may want to try this:
http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001623 but beware, it
is experimental, and at present it may be broken as it's not synced with
recent Kinetis patches.
Take care not to lock your Kinetis flash - You have been warned :)

I hope this helps and I would appreciate feedback.

Regards
Ilija

diff -ruN -x CVS -x '.*' ecos/packages/hal/cortexm/kinetis/var/current/cdl/hal_cortexm_kinetis.cdl ecos_kin_jones/packages/hal/cortexm/kinetis/var/current/cdl/hal_cortexm_kinetis.cdl
--- ecos/packages/hal/cortexm/kinetis/var/current/cdl/hal_cortexm_kinetis.cdl	2012-11-03 17:13:05.953836177 +0100
+++ ecos_kin_jones/packages/hal/cortexm/kinetis/var/current/cdl/hal_cortexm_kinetis.cdl	2012-12-01 22:37:50.159462935 +0100
@@ -209,7 +209,7 @@
         parent        CYG_HAL_STARTUP_ENV
         default_value { (CYG_HAL_STARTUP_PLF) && (CYG_HAL_STARTUP_PLF!="ByVariant") ?
                         "ByPlatform" : "ROM" }
-        legal_values  { "ROM" "SRAM" }
+        legal_values  { "ROM" "SRAM" "RAM" }
         active_if     ((!CYG_HAL_STARTUP_PLF) || (CYG_HAL_STARTUP_PLF=="ByVariant"))
         description   "
             'ROM' startup builds a stand-alone application which will
@@ -340,6 +340,8 @@
             . CYGHWR_HAL_CORTEXM_KINETIS_OC_MEM_LAYOUT  . "_rom" :
             (CYG_HAL_STARTUP == "SRAM") ? "kinetis_"
             . CYGHWR_HAL_CORTEXM_KINETIS_OC_MEM_LAYOUT  . "_sram" :
+            (CYG_HAL_STARTUP == "RAM") ? "kinetis_"
+            . CYGHWR_HAL_CORTEXM_KINETIS_OC_MEM_LAYOUT  . "_ram" :
             "undefined" }
         description "
             Combination of 'Startup type' and 'Kinetis part'

diff -ruN -x CVS -x '.*' ecos/packages/hal/cortexm/kinetis/var/current/include/pkgconf/mlt_kinetis_flash_unisram_ram.h ecos_kin_jones/packages/hal/cortexm/kinetis/var/current/include/pkgconf/mlt_kinetis_flash_unisram_ram.h
--- ecos/packages/hal/cortexm/kinetis/var/current/include/pkgconf/mlt_kinetis_flash_unisram_ram.h	1970-01-01 01:00:00.000000000 +0100
+++ ecos_kin_jones/packages/hal/cortexm/kinetis/var/current/include/pkgconf/mlt_kinetis_flash_unisram_ram.h	2012-12-01 22:39:30.267467079 +0100
@@ -0,0 +1,18 @@
+// eCos memory layout
+
+#ifndef __ASSEMBLER__
+#include <cyg/infra/cyg_type.h>
+#include <stddef.h>
+
+#endif
+#define CYGMEM_REGION_ram (0x20000000 - CYGHWR_HAL_KINETIS_SRAM_BANK_SIZE)
+#define CYGMEM_REGION_ram_SIZE (CYGHWR_HAL_KINETIS_SRAM_SIZE-CYGNUM_HAL_COMMON_INTERRUPTS_STACK_SIZE)
+#define CYGMEM_REGION_ram_ATTR (CYGMEM_REGION_ATTR_R | CYGMEM_REGION_ATTR_W)
+
+#ifndef __ASSEMBLER__
+extern char CYG_LABEL_NAME (__heap1) [];
+#endif
+#define CYGMEM_SECTION_heap1 (CYG_LABEL_NAME (__heap1))
+#define CYGMEM_SECTION_heap1_SIZE (CYGMEM_REGION_ram+CYGMEM_REGION_ram_SIZE - (size_t) CYG_LABEL_NAME (__heap1))
+
+
diff -ruN -x CVS -x '.*' ecos/packages/hal/cortexm/kinetis/var/current/include/pkgconf/mlt_kinetis_flash_unisram_ram.ldi ecos_kin_jones/packages/hal/cortexm/kinetis/var/current/include/pkgconf/mlt_kinetis_flash_unisram_ram.ldi
--- ecos/packages/hal/cortexm/kinetis/var/current/include/pkgconf/mlt_kinetis_flash_unisram_ram.ldi	1970-01-01 01:00:00.000000000 +0100
+++ ecos_kin_jones/packages/hal/cortexm/kinetis/var/current/include/pkgconf/mlt_kinetis_flash_unisram_ram.ldi	2012-12-02 10:23:47.950382495 +0100
@@ -0,0 +1,34 @@
+// eCos memory layout
+
+#include <pkgconf/hal.h>
+#include <cyg/infra/cyg_type.inc>
+
+MEMORY
+{
+    ram  : ORIGIN = 0x20000000 - CYGHWR_HAL_KINETIS_SRAM_BANK_SIZE, LENGTH = CYGHWR_HAL_KINETIS_SRAM_SIZE-CYGNUM_HAL_COMMON_INTERRUPTS_STACK_SIZE
+    flash : ORIGIN = 0x00000000, LENGTH = CYGHWR_HAL_KINETIS_FLASH_SIZE
+}
+
+SECTIONS
+{
+    SECTIONS_BEGIN
+    SECTION_rom_vectors (ram, 0x20000400 - CYGHWR_HAL_KINETIS_SRAM_BANK_SIZE + 0xe000, LMA_EQ_VMA)
+    SECTION_RELOCS (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_text (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_fini (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_rodata (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_rodata1 (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_fixup (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_gcc_except_table (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_eh_frame (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_got (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_data (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_sram (ram, ALIGN (0x8), LMA_EQ_VMA)
+    SECTION_bss (ram, ALIGN (0x8), LMA_EQ_VMA)
+    CYG_LABEL_DEFN(__heap1) = ALIGN (0x8);
+    SECTIONS_END
+}
+
+hal_vsr_table = (0x20000000 - CYGHWR_HAL_KINETIS_SRAM_BANK_SIZE);
+hal_virtual_vector_table = hal_vsr_table + 128*4;
+hal_startup_stack = 0x20000000 + CYGHWR_HAL_KINETIS_SRAM_BANK_SIZE;

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