| Message ID | 1488444139-16672-1-git-send-email-ruchika.gupta@nxp.com |
|---|---|
| State | Superseded |
| Delegated to: | York Sun |
| Headers | show
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Ip=[192.88.168.50]; Helo=[tx30smr01.am.freescale.net] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR03MB1944 Cc: Ruchika Gupta <ruchika.gupta@nxp.com> Subject: [U-Boot] [PATCH] powerpc: e6500: Lock/unlock 1 cache instead of L1 as init_ram X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion <u-boot.lists.denx.de> List-Unsubscribe: <http://lists.denx.de/options/u-boot>, <mailto:u-boot-request@lists.denx.de?subject=unsubscribe> List-Archive: <http://lists.denx.de/pipermail/u-boot/> List-Post: <mailto:u-boot@lists.denx.de> List-Help: <mailto:u-boot-request@lists.denx.de?subject=help> List-Subscribe: <http://lists.denx.de/listinfo/u-boot>, <mailto:u-boot-request@lists.denx.de?subject=subscribe> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" <u-boot-bounces@lists.denx.de> |
diff --git a/arch/powerpc/cpu/mpc85xx/start.S b/arch/powerpc/cpu/mpc85xx/start.S index c3e1234..b9a4cb5 100644 --- a/arch/powerpc/cpu/mpc85xx/start.S +++ b/arch/powerpc/cpu/mpc85xx/start.S @@ -1145,8 +1145,9 @@ switch_as: li r0,0 1: dcbz r0,r3 -#ifdef CONFIG_E6500 /* Lock/unlock L2 cache instead of L1 */ +#ifdef CONFIG_E6500 /* Lock/unlock L2 cache long with L1 */ dcbtls 2, r0, r3 + dcbtls 0, r0, r3 #else dcbtls 0, r0, r3 #endif @@ -1790,8 +1791,9 @@ unlock_ram_in_cache: slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT) mtctr r4 1: dcbi r0,r3 -#ifdef CONFIG_E6500 /* lock/unlock L2 cache instead of L1 */ +#ifdef CONFIG_E6500 /* lock/unlock L2 cache long with L1 */ dcblc 2, r0, r3 + dcblc 0, r0, r3 #else dcblc r0,r3 #endif
Fir E6500 cores, L2 cache has been used as init_ram. L1 cache is a write through cache on E6500.If lines are not locked in both L1 and L2 caches, crashes are observed during secure boot. This patch locks/unlocks both L1 as well as L2 cache to prevent the crash. Signed-off-by: Ruchika Gupta <ruchika.gupta@nxp.com> --- arch/powerpc/cpu/mpc85xx/start.S | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)