From: wdenk Date: Fri, 1 Apr 2005 09:14:58 +0000 (+0000) Subject: Patch by Steven Scholz, 13 March 2005: X-Git-Tag: LABEL_2006_03_12_0025~341 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=f50cc09b613c5fab3b47079198ec476b7c227859;p=oweals%2Fu-boot.git Patch by Steven Scholz, 13 March 2005: fix cache enabling for AT91RM9200 --- diff --git a/CHANGELOG b/CHANGELOG index d7dcec7ea8..9bdace71aa 100644 --- a/CHANGELOG +++ b/CHANGELOG @@ -2,6 +2,9 @@ Changes for U-Boot 1.1.3: ====================================================================== +* Patch by Steven Scholz, 13 March 2005: + fix cache enabling for AT91RM9200 + * Patch by Masami Komiya, 30 Mar 2005: add SNTP support and expand time server and time offset fields of DHCP support. See doc/README.SNTP diff --git a/cpu/at91rm9200/start.S b/cpu/at91rm9200/start.S index 43ab93db61..0dbc0094a4 100644 --- a/cpu/at91rm9200/start.S +++ b/cpu/at91rm9200/start.S @@ -127,21 +127,20 @@ reset: * is why it's called lowlevelinit */ bl lowlevelinit /* in lowlevel.S */ - bl icache_enable; - /*------------------------------------ - Read/modify/write CP15 control register - ------------------------------------- - read cp15 control register (cp15 r1) in r0 - ------------------------------------*/ - mrc p15, 0, r0, c1, c0, 0 - /* Reset bit :Little Endian end fast bus mode */ - ldr r3, =0xC0000080 - /* Set bit :Asynchronous clock mode, Not Fast Bus */ - ldr r4, =0xC0000000 - bic r0, r0, r3 - orr r0, r0, r4 - /* write r0 in cp15 control register (cp15 r1) */ - mcr p15, 0, r0, c1, c0, 0 + + /* + * Read/modify/write CP15 control register + * disable MMU, enable I-Cache, select Asychronous Clocking Mode + */ + + mrc p15, 0, r0, c1, c0, 0 @ read cp15 control register (cp15 r1) in r0 + bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS) + bic r0, r0, #0x0000008f @ clear bits 7, 3:0 (B--- WCAM) + orr r0, r0, #0x00000002 @ set bit 2 (A) Align + orr r0, r0, #0x00000004 @ set bit 3 (C) D-Cache + orr r0, r0, #0x00001000 @ set bit 12 (I) I-Cache + orr r0, r0, #0xC0000000 @ set bits 31:30 (iA, nF) + mcr p15, 0, r0, c1, c0, 0 @ write r0 in cp15 control register (cp15 r1) #endif /* CONFIG_BOOTBINFUNC */ /* * relocate exeception table