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Split ram_ahb memory region into two, with a 32K hole where the USB buffers live.

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Split ram region into two, representing the two local RAM buses.
Remove reference to usbram.ld, since it's no longer necessary.
This commit is contained in:
Jared Boone
2012-10-10 14:27:21 -07:00
parent f34e30510d
commit 39eb2682f9
4 changed files with 22 additions and 48 deletions
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12
firmware/common/LPC4330_M4.ld
View File

@ -26,12 +26,16 @@ MEMORY
{
/* rom is really the shadow region that points to SPI flash or elsewhere */
rom (rx) : ORIGIN = 0x00000000, LENGTH = 1M
ram (rwx) : ORIGIN = 0x10000000, LENGTH = 128K
ram_local1 (rwx) : ORIGIN = 0x10000000, LENGTH = 128K
ram_local2 (rwx) : ORIGIN = 0x10080000, LENGTH = 72K
/* there are some additional RAM regions */
ram_ahb (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
ram_ahb1 (rwx) : ORIGIN = 0x20000000, LENGTH = 16K
/* Removed 32K of AHB SRAM for USB buffer. Straddles two blocks of RAM
* to get performance benefit of having two USB buffers addressable
* simultaneously (on two different buses of the AHB multilayer matrix)
*/
ram_ahb2 (rwx) : ORIGIN = 0x2000C000, LENGTH = 16K
}
/* Include the common ld script. */
INCLUDE libopencm3_lpc43xx.ld
INCLUDE usbram.ld

14
firmware/common/LPC4330_M4_ROM_to_RAM.ld
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@ -29,13 +29,15 @@ MEMORY
rom_flash (rx) : ORIGIN = 0x80000000, LENGTH = 1M
/* rom is really the shadow region that points to SPI flash or elsewhere */
rom (rx) : ORIGIN = 0x00000000, LENGTH = 1M
ram (rwx) : ORIGIN = 0x10000000, LENGTH = 128K
/* there are some additional RAM regions for data */
ram_data (rw) : ORIGIN = 0x10080000, LENGTH = 72K
ram_ahb (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
ram_local1 (rwx) : ORIGIN = 0x10000000, LENGTH = 128K
ram_local2 (rwx) : ORIGIN = 0x10080000, LENGTH = 72K
ram_ahb1 (rwx) : ORIGIN = 0x20000000, LENGTH = 16K
/* Removed 32K of AHB SRAM for USB buffer. Straddles two blocks of RAM
* to get performance benefit of having two USB buffers addressable
* simultaneously (on two different buses of the AHB multilayer matrix)
*/
ram_ahb2 (rwx) : ORIGIN = 0x2000C000, LENGTH = 16K
}
/* Include the common ld script. */
INCLUDE libopencm3_lpc43xx_rom_to_ram.ld
INCLUDE usbram.ld

9
firmware/common/LPC4330_M4_ram_only.ld
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@ -26,10 +26,13 @@ MEMORY
{
ram_local1 (rwx) : ORIGIN = 0x10000000, LENGTH = 128K
ram_local2 (rwx) : ORIGIN = 0x10080000, LENGTH = 72K
ram_ahb (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
ram_ahb1 (rwx) : ORIGIN = 0x20000000, LENGTH = 16K
/* Removed 32K of AHB SRAM for USB buffer. Straddles two blocks of RAM
* to get performance benefit of having two USB buffers addressable
* simultaneously (on two different buses of the AHB multilayer matrix)
*/
ram_ahb2 (rwx) : ORIGIN = 0x2000C000, LENGTH = 16K
}
/* Include the common ld script. */
INCLUDE libopencm3_lpc43xx_ram_only.ld
INCLUDE usbram.ld

35
firmware/common/usbram.ld
View File

@ -1,35 +0,0 @@
/*
* Copyright 2012 Jared Boone <jared@sharebrained.com>
*
* This file is part of HackRF
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
SECTIONS
{
. = ORIGIN(ram_ahb);
.usbram : {
. = ALIGN(4096);
*(.usb_data)
. = ALIGN(2048);
*(.usb_qh)
. = ALIGN(64);
*(.usb_td)
} >ram_ahb
}