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Eliminate hard-coded address of Ethernet transfer buffer on at91rm9200

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Patch by Anders Larsen, 07 Oct 2005

The Atmel errata #11 states that the transfer buffer descriptor
table must be aligned on a 16-word boundary. As it turned out, this
is insufficient - it seems the table must be aligned on a boundary
at least as large as the table itself (in Linux this is not an
issue - the table is aligned on a PAGE_SIZE (4096) boundary).
This commit is contained in:
Wolfgang Denk 2005-10-09 00:33:37 +02:00
parent 47340a46f6
commit 95f9dda216
3 changed files with 18 additions and 15 deletions
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9
CHANGELOG
View file

@ -2,6 +2,15 @@
Changes for U-Boot 1.1.4:
======================================================================
* Eliminate hard-coded address of Ethernet transfer buffer on at91rm9200
Patch by Anders Larsen, 07 Oct 2005
The Atmel errata #11 states that the transfer buffer descriptor
table must be aligned on a 16-word boundary. As it turned out, this
is insufficient - it seems the table must be aligned on a boundary
at least as large as the table itself (in Linux this is not an
issue - the table is aligned on a PAGE_SIZE (4096) boundary).
* Fixed compilation for ARM when using a (standard) hard-FP toolchain
Patch by Anders Larsen, 07 Oct 2005

2
board/csb637/config.mk
View file

@ -1 +1 @@
TEXT_BASE = 0x23fe0000
TEXT_BASE = 0x23fc0000

22
cpu/arm920t/at91rm9200/ether.c
View file

@ -44,21 +44,19 @@ typedef struct {
#define RBF_LOCAL2 (1<<24)
#define RBF_LOCAL1 (1<<23)
/* Emac Buffers in last 512KBytes of SDRAM*/
/* Be careful, buffer size is limited to 512KBytes !!! */
#define RBF_FRAMEMAX 100
/*#define RBF_FRAMEMEM 0x200000 */
#define RBF_FRAMEMEM 0x21F80000
#define RBF_FRAMEMAX 64
#define RBF_FRAMELEN 0x600
#define RBF_FRAMEBTD RBF_FRAMEMEM
#define RBF_FRAMEBUF (RBF_FRAMEMEM + RBF_FRAMEMAX*sizeof(rbf_t))
#ifdef CONFIG_DRIVER_ETHER
#if (CONFIG_COMMANDS & CFG_CMD_NET)
/* alignment as per Errata #11 (64 bytes) is insufficient! */
rbf_t rbfdt[RBF_FRAMEMAX] __attribute((aligned(512)));
rbf_t *rbfp;
unsigned char rbf_framebuf[RBF_FRAMEMAX][RBF_FRAMELEN] __attribute((aligned(4)));
/* structure to interface the PHY */
AT91S_PhyOps PhyOps;
@ -153,9 +151,6 @@ UCHAR at91rm9200_EmacWritePhy (AT91PS_EMAC p_mac,
}
rbf_t *rbfdt;
rbf_t *rbfp;
int eth_init (bd_t * bd)
{
int ret;
@ -188,9 +183,8 @@ int eth_init (bd_t * bd)
p_mac->EMAC_CFG |= AT91C_EMAC_CSR; /* Clear statistics */
/* Init Ehternet buffers */
rbfdt = (rbf_t *) RBF_FRAMEBTD;
for (i = 0; i < RBF_FRAMEMAX; i++) {
rbfdt[i].addr = RBF_FRAMEBUF + RBF_FRAMELEN * i;
rbfdt[i].addr = rbf_framebuf[i];
rbfdt[i].size = 0;
}
rbfdt[RBF_FRAMEMAX - 1].addr |= RBF_WRAP;