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ddr: altera: sdram: Make sdram_start and sdram_end into u32

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Originally, both sdram_start and sdram_end were 64b values. The
sdram_start had no reason for being so, since our address space
is only 32b, so switching sdram_start to u32 is simple.

The sdram_end is a bit more complex, since it can actually be
set to (1 << 32) if someone really wanted to use an SoCFPGA with
4 GiB of DRAM and fixed the code around a little. But, the code
handling the protection rules internally decrements the sdram_end
variable anyway. Thus, instead of calling the code and passing in
the address of the SDRAM end, pass in the address already decremented
by one. This lets the sdram_end be 32b as well.

Signed-off-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Marek Vasut
2015-08-01 23:12:11 +02:00
parent 6d01595f63
commit 08eb947004
1 changed files with 12 additions and 11 deletions
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23
drivers/ddr/altera/sdram.c
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@@ -15,8 +15,8 @@
DECLARE_GLOBAL_DATA_PTR;
struct sdram_prot_rule {
u64 sdram_start; /* SDRAM start address */
u64 sdram_end; /* SDRAM end address */
u32 sdram_start; /* SDRAM start address */
u32 sdram_end; /* SDRAM end address */
u32 rule; /* SDRAM protection rule number: 0-19 */
int valid; /* Rule valid or not? 1 - valid, 0 not*/
@@ -109,8 +109,8 @@ static int get_errata_rows(const struct socfpga_sdram_config *cfg)
/* SDRAM protection rules vary from 0-19, a total of 20 rules. */
static void sdram_set_rule(struct sdram_prot_rule *prule)
{
uint32_t lo_addr_bits;
uint32_t hi_addr_bits;
u32 lo_addr_bits;
u32 hi_addr_bits;
int ruleno = prule->rule;
/* Select the rule */
@@ -118,11 +118,11 @@ static void sdram_set_rule(struct sdram_prot_rule *prule)
/* Obtain the address bits */
lo_addr_bits = prule->sdram_start >> 20ULL;
hi_addr_bits = (prule->sdram_end - 1) >> 20ULL;
hi_addr_bits = prule->sdram_end >> 20ULL;
debug("sdram set rule start %x, %lld\n", lo_addr_bits,
debug("sdram set rule start %x, %d\n", lo_addr_bits,
prule->sdram_start);
debug("sdram set rule end %x, %lld\n", hi_addr_bits,
debug("sdram set rule end %x, %d\n", hi_addr_bits,
prule->sdram_end);
/* Set rule addresses */
@@ -174,7 +174,8 @@ static void sdram_get_rule(struct sdram_prot_rule *prule)
prule->result = (data >> 13) & 0x1;
}
static void sdram_set_protection_config(uint64_t sdram_start, uint64_t sdram_end)
static void
sdram_set_protection_config(const u32 sdram_start, const u32 sdram_end)
{
struct sdram_prot_rule rule;
int rules;
@@ -219,8 +220,8 @@ static void sdram_dump_protection_config(void)
for (rules = 0; rules < 20; rules++) {
sdram_get_rule(&rule);
debug("Rule %d, rules ...\n", rules);
debug(" sdram start %llx\n", rule.sdram_start);
debug(" sdram end %llx\n", rule.sdram_end);
debug(" sdram start %x\n", rule.sdram_start);
debug(" sdram end %x\n", rule.sdram_end);
debug(" low prot id %d, hi prot id %d\n",
rule.lo_prot_id,
rule.hi_prot_id);
@@ -457,7 +458,7 @@ int sdram_mmr_init_full(unsigned int sdr_phy_reg)
SDR_CTRLGRP_STATICCFG_APPLYCFG_MASK,
1 << SDR_CTRLGRP_STATICCFG_APPLYCFG_LSB);
sdram_set_protection_config(0, sdram_calculate_size());
sdram_set_protection_config(0, sdram_calculate_size() - 1);
sdram_dump_protection_config();